diff --git a/src/components/legend/attributes.js b/src/components/legend/attributes.js
index f294d2471f0..f0a94879862 100644
--- a/src/components/legend/attributes.js
+++ b/src/components/legend/attributes.js
@@ -74,6 +74,19 @@ module.exports = {
             'Sets the amount of vertical space (in px) between legend groups.'
         ].join(' ')
     },
+    entrywidth: {
+        valType: 'number',
+        min: 0,
+        editType: 'legend',
+        description: 'Sets the width (in px or fraction) of the legend.',
+    },
+    entrywidthmode: {
+        valType: 'enumerated',
+        values: ['fraction', 'pixels'],
+        dflt: 'pixels',
+        editType: 'legend',
+        description: 'Determines what entrywidth means.',
+    },
     itemsizing: {
         valType: 'enumerated',
         values: ['trace', 'constant'],
diff --git a/src/components/legend/defaults.js b/src/components/legend/defaults.js
index 70afc29ab33..a2bfc776848 100644
--- a/src/components/legend/defaults.js
+++ b/src/components/legend/defaults.js
@@ -122,6 +122,8 @@ module.exports = function legendDefaults(layoutIn, layoutOut, fullData) {
     coerce('traceorder', defaultOrder);
     if(helpers.isGrouped(layoutOut.legend)) coerce('tracegroupgap');
 
+    coerce('entrywidth');
+    coerce('entrywidthmode');
     coerce('itemsizing');
     coerce('itemwidth');
 
diff --git a/src/components/legend/draw.js b/src/components/legend/draw.js
index 7d0ff625fb5..11f81d2185c 100644
--- a/src/components/legend/draw.js
+++ b/src/components/legend/draw.js
@@ -351,6 +351,23 @@ function _draw(gd, legendObj) {
         }], gd);
 }
 
+function getTraceWidth(trace, legendObj, textGap) {
+    var legendItem = trace[0];
+    var legendWidth = legendItem.width;
+
+    var traceLegendWidth = legendItem.trace.legendwidth || legendObj.entrywidth;
+
+    if(traceLegendWidth) {
+        if(legendObj.entrywidthmode === 'pixels') {
+            return traceLegendWidth + textGap;
+        } else {
+            return legendObj._maxWidth * traceLegendWidth;
+        }
+    }
+
+    return legendWidth + textGap;
+}
+
 function clickOrDoubleClick(gd, legend, legendItem, numClicks, evt) {
     var trace = legendItem.data()[0][0].trace;
     var evtData = {
@@ -636,6 +653,7 @@ function computeLegendDimensions(gd, groups, traces, legendObj) {
     var isAbovePlotArea = legendObj.y > 1 || (legendObj.y === 1 && yanchor === 'bottom');
 
     var traceGroupGap = legendObj.tracegroupgap;
+    var legendGroupWidths = {};
 
     // - if below/above plot area, give it the maximum potential margin-push value
     // - otherwise, extend the height of the plot area
@@ -688,7 +706,7 @@ function computeLegendDimensions(gd, groups, traces, legendObj) {
         var maxItemWidth = 0;
         var combinedItemWidth = 0;
         traces.each(function(d) {
-            var w = d[0].width + textGap;
+            var w = getTraceWidth(d, legendObj, textGap);
             maxItemWidth = Math.max(maxItemWidth, w);
             combinedItemWidth += w;
         });
@@ -704,7 +722,7 @@ function computeLegendDimensions(gd, groups, traces, legendObj) {
                 var maxWidthInGroup = 0;
                 var offsetY = 0;
                 d3.select(this).selectAll('g.traces').each(function(d) {
-                    var w = d[0].width;
+                    var w = getTraceWidth(d, legendObj, textGap);
                     var h = d[0].height;
 
                     Drawing.setTranslate(this,
@@ -712,7 +730,8 @@ function computeLegendDimensions(gd, groups, traces, legendObj) {
                         titleSize[1] + bw + itemGap + h / 2 + offsetY
                     );
                     offsetY += h;
-                    maxWidthInGroup = Math.max(maxWidthInGroup, textGap + w);
+                    maxWidthInGroup = Math.max(maxWidthInGroup, w);
+                    legendGroupWidths[d[0].trace.legendgroup] = maxWidthInGroup;
                 });
 
                 var next = maxWidthInGroup + itemGap;
@@ -750,8 +769,12 @@ function computeLegendDimensions(gd, groups, traces, legendObj) {
             var rowWidth = 0;
             traces.each(function(d) {
                 var h = d[0].height;
-                var w = textGap + d[0].width;
-                var next = (oneRowLegend ? w : maxItemWidth) + itemGap;
+                var w = getTraceWidth(d, legendObj, textGap, isGrouped);
+                var next = (oneRowLegend ? w : maxItemWidth);
+
+                if(legendObj.entrywidthmode !== 'fraction') {
+                    next += itemGap;
+                }
 
                 if((next + bw + offsetX - itemGap) >= legendObj._maxWidth) {
                     maxRowWidth = Math.max(maxRowWidth, rowWidth);
@@ -802,8 +825,15 @@ function computeLegendDimensions(gd, groups, traces, legendObj) {
     traces.each(function(d) {
         var traceToggle = d3.select(this).select('.legendtoggle');
         var h = d[0].height;
-        var w = isEditable ? textGap : (toggleRectWidth || (textGap + d[0].width));
-        if(!isVertical) w += itemGap / 2;
+        var legendgroup = d[0].trace.legendgroup;
+        var traceWidth = getTraceWidth(d, legendObj, textGap);
+        if(isGrouped && legendgroup !== '') {
+            traceWidth = legendGroupWidths[legendgroup];
+        }
+        var w = isEditable ? textGap : (toggleRectWidth || traceWidth);
+        if(!isVertical && legendObj.entrywidthmode !== 'fraction') {
+            w += itemGap / 2;
+        }
         Drawing.setRect(traceToggle, 0, -h / 2, w, h);
     });
 }
diff --git a/src/plots/attributes.js b/src/plots/attributes.js
index f90582ec200..9f9952cbfc5 100644
--- a/src/plots/attributes.js
+++ b/src/plots/attributes.js
@@ -72,6 +72,12 @@ module.exports = {
             'and ranks greater than 1000 to go after all unranked items.'
         ].join(' ')
     },
+    legendwidth: {
+        valType: 'number',
+        min: 0,
+        editType: 'style',
+        description: 'Sets the width (in px or fraction) of the legend for this trace.',
+    },
     opacity: {
         valType: 'number',
         min: 0,
diff --git a/src/plots/plots.js b/src/plots/plots.js
index e7018f70647..a29f912092d 100644
--- a/src/plots/plots.js
+++ b/src/plots/plots.js
@@ -1320,6 +1320,7 @@ plots.supplyTraceDefaults = function(traceIn, traceOut, colorIndex, layout, trac
                 'showlegend'
             );
 
+            coerce('legendwidth');
             coerce('legendgroup');
             coerce('legendgrouptitle.text');
             coerce('legendrank');
diff --git a/test/jasmine/tests/legend_test.js b/test/jasmine/tests/legend_test.js
index f1c71c12bd3..2a68e6b753a 100644
--- a/test/jasmine/tests/legend_test.js
+++ b/test/jasmine/tests/legend_test.js
@@ -6,6 +6,7 @@ var DBLCLICKDELAY = require('@src/plot_api/plot_config').dfltConfig.doubleClickD
 var Legend = require('@src/components/legend');
 var getLegendData = require('@src/components/legend/get_legend_data');
 var helpers = require('@src/components/legend/helpers');
+var constants = require('@src/components/legend/constants');
 
 var d3Select = require('../../strict-d3').select;
 var d3SelectAll = require('../../strict-d3').selectAll;
@@ -2345,3 +2346,87 @@ describe('legend with custom doubleClickDelay', function() {
         .then(done, done.fail);
     }, 3 * jasmine.DEFAULT_TIMEOUT_INTERVAL);
 });
+
+describe('legend with custom legendwidth', function() {
+    var gd;
+
+    var data = [
+        {x: [1, 2, 1], y: [1, 2, 1], name: 'legend text 1'},
+        {x: [2, 1, 2], y: [2, 1, 2], name: 'legend text 12'},
+        {x: [2, 3, 4], y: [2, 3, 4], name: 'legend text 123'}
+    ];
+
+    var layout = {
+        legend: {
+            orientation: 'h'
+        }
+    };
+
+    beforeEach(function() {
+        gd = createGraphDiv();
+    });
+
+    afterEach(destroyGraphDiv);
+
+    function assertLegendTextWidth(variants) {
+        var nodes = d3SelectAll('rect.legendtoggle');
+        var index = 0;
+        nodes.each(function() {
+            var node = d3Select(this);
+            var w = +node.attr('width');
+            if(variants[index]) expect(w).toEqual(variants[index]);
+            index += 1;
+        });
+    }
+
+    it('should change width when trace has legendwidth', function(done) {
+        var extendedData = Lib.extendDeep([], data);
+        extendedData.forEach(function(trace, index) {
+            trace.legendwidth = (index + 1) * 50;
+        });
+
+        var textGap = 30 + constants.itemGap * 2 + constants.itemGap / 2;
+
+        Plotly.newPlot(gd, {data: extendedData, layout: layout}).then(function() {
+            assertLegendTextWidth([50 + textGap, 100 + textGap, 150 + textGap]);
+        }).then(done);
+    });
+
+    it('should change width when legend has entrywidth', function(done) {
+        var extendedLayout = Lib.extendDeep([], layout);
+        var width = 50;
+        extendedLayout.legend.entrywidth = width;
+
+        var textGap = 30 + constants.itemGap * 2 + constants.itemGap / 2;
+
+        Plotly.newPlot(gd, {data: data, layout: extendedLayout}).then(function() {
+            assertLegendTextWidth([width + textGap, width + textGap, width + textGap]);
+        }).then(done);
+    });
+
+    it('should change group width when trace has legendwidth', function(done) {
+        var extendedLayout = Lib.extendDeep([], layout);
+        extendedLayout.legend.traceorder = 'grouped';
+
+        var extendedData = Lib.extendDeep([], data);
+        extendedData[0].legendwidth = 100;
+        extendedData[0].legendgroup = 'test';
+        extendedData[1].legendgroup = 'test';
+
+        var textGap = 30 + constants.itemGap * 2 + constants.itemGap / 2;
+
+        Plotly.newPlot(gd, {data: extendedData, layout: extendedLayout}).then(function() {
+            assertLegendTextWidth([100 + textGap, 100 + textGap, undefined]);
+        }).then(done);
+    });
+
+    it('should change width when legend has entrywidth and entrywidthmode is fraction', function(done) {
+        var extendedLayout = Lib.extendDeep([], layout);
+        extendedLayout.legend.entrywidthmode = 'fraction';
+        extendedLayout.legend.entrywidth = 0.3;
+
+        Plotly.newPlot(gd, {data: data, layout: extendedLayout}).then(function() {
+            assertLegendTextWidth([162, 162, 162]);
+        }).then(done);
+    });
+});
diff --git a/test/plot-schema.json b/test/plot-schema.json
index 8aed6ab4651..2eca862f6b2 100644
--- a/test/plot-schema.json
+++ b/test/plot-schema.json
@@ -2750,6 +2750,22 @@
      "valType": "number"
     },
     "editType": "legend",
+    "entrywidth": {
+     "description": "Sets the width (in px or fraction) of the legend.",
+     "editType": "legend",
+     "min": 0,
+     "valType": "number"
+    },
+    "entrywidthmode": {
+     "description": "Determines what entrywidth means.",
+     "dflt": "pixels",
+     "editType": "legend",
+     "valType": "enumerated",
+     "values": [
+      "fraction",
+      "pixels"
+     ]
+    },
     "font": {
      "color": {
       "editType": "legend",
@@ -12610,6 +12626,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "marker": {
      "autocolorscale": {
       "description": "Determines whether the colorscale is a default palette (`autocolorscale: true`) or the palette determined by `marker.colorscale`. Has an effect only if in `marker.color` is set to a numerical array. In case `colorscale` is unspecified or `autocolorscale` is true, the default palette will be chosen according to whether numbers in the `color` array are all positive, all negative or mixed.",
@@ -14125,6 +14147,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "marker": {
      "autocolorscale": {
       "description": "Determines whether the colorscale is a default palette (`autocolorscale: true`) or the palette determined by `marker.colorscale`. Has an effect only if in `marker.color` is set to a numerical array. In case `colorscale` is unspecified or `autocolorscale` is true, the default palette will be chosen according to whether numbers in the `color` array are all positive, all negative or mixed.",
@@ -15419,6 +15447,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the color of line bounding the box(es).",
@@ -16738,6 +16772,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "editType": "style",
      "role": "object",
@@ -18234,6 +18274,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "meta": {
      "arrayOk": true,
      "description": "Assigns extra meta information associated with this trace that can be used in various text attributes. Attributes such as trace `name`, graph, axis and colorbar `title.text`, annotation `text` `rangeselector`, `updatemenues` and `sliders` `label` text all support `meta`. To access the trace `meta` values in an attribute in the same trace, simply use `%{meta[i]}` where `i` is the index or key of the `meta` item in question. To access trace `meta` in layout attributes, use `%{data[n[.meta[i]}` where `i` is the index or key of the `meta` and `n` is the trace index.",
@@ -19082,6 +19128,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "locationmode": {
      "description": "Determines the set of locations used to match entries in `locations` to regions on the map. Values *ISO-3*, *USA-states*, *country names* correspond to features on the base map and value *geojson-id* corresponds to features from a custom GeoJSON linked to the `geojson` attribute.",
      "dflt": "ISO-3",
@@ -20069,6 +20121,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "locations": {
      "description": "Sets which features found in *geojson* to plot using their feature `id` field.",
      "editType": "calc",
@@ -21085,6 +21143,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "lighting": {
      "ambient": {
       "description": "Ambient light increases overall color visibility but can wash out the image.",
@@ -22277,6 +22341,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the color of the contour level. Has no effect if `contours.coloring` is set to *lines*.",
@@ -23515,6 +23585,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the color of the contour level. Has no effect if `contours.coloring` is set to *lines*.",
@@ -24464,6 +24540,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "lon": {
      "description": "Sets the longitude coordinates (in degrees East).",
      "editType": "calc",
@@ -24995,6 +25077,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "marker": {
      "autocolorscale": {
       "description": "Determines whether the colorscale is a default palette (`autocolorscale: true`) or the palette determined by `marker.colorscale`. Has an effect only if in `marker.color` is set to a numerical array. In case `colorscale` is unspecified or `autocolorscale` is true, the default palette will be chosen according to whether numbers in the `color` array are all positive, all negative or mixed.",
@@ -26416,6 +26504,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "marker": {
      "colors": {
       "description": "Sets the color of each sector. If not specified, the default trace color set is used to pick the sector colors.",
@@ -27486,6 +27580,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "meta": {
      "arrayOk": true,
      "description": "Assigns extra meta information associated with this trace that can be used in various text attributes. Attributes such as trace `name`, graph, axis and colorbar `title.text`, annotation `text` `rangeselector`, `updatemenues` and `sliders` `label` text all support `meta`. To access the trace `meta` values in an attribute in the same trace, simply use `%{meta[i]}` where `i` is the index or key of the `meta` item in question. To access trace `meta` in layout attributes, use `%{data[n[.meta[i]}` where `i` is the index or key of the `meta` and `n` is the trace index.",
@@ -28611,6 +28711,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "meta": {
      "arrayOk": true,
      "description": "Assigns extra meta information associated with this trace that can be used in various text attributes. Attributes such as trace `name`, graph, axis and colorbar `title.text`, annotation `text` `rangeselector`, `updatemenues` and `sliders` `label` text all support `meta`. To access the trace `meta` values in an attribute in the same trace, simply use `%{meta[i]}` where `i` is the index or key of the `meta` item in question. To access trace `meta` in layout attributes, use `%{data[n[.meta[i]}` where `i` is the index or key of the `meta` and `n` is the trace index.",
@@ -29398,6 +29504,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "marker": {
      "autocolorscale": {
       "description": "Determines whether the colorscale is a default palette (`autocolorscale: true`) or the palette determined by `marker.colorscale`. Has an effect only if in `marker.color` is set to a numerical array. In case `colorscale` is unspecified or `autocolorscale` is true, the default palette will be chosen according to whether numbers in the `color` array are all positive, all negative or mixed.",
@@ -31350,6 +31462,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "marker": {
      "color": {
       "description": "Sets the aggregation data.",
@@ -32610,6 +32728,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the color of the contour level. Has no effect if `contours.coloring` is set to *lines*.",
@@ -33361,6 +33485,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "level": {
      "anim": true,
      "description": "Sets the level from which this trace hierarchy is rendered. Set `level` to `''` to start from the root node in the hierarchy. Must be an \"id\" if `ids` is filled in, otherwise plotly attempts to find a matching item in `labels`.",
@@ -34570,6 +34700,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "meta": {
      "arrayOk": true,
      "description": "Assigns extra meta information associated with this trace that can be used in various text attributes. Attributes such as trace `name`, graph, axis and colorbar `title.text`, annotation `text` `rangeselector`, `updatemenues` and `sliders` `label` text all support `meta`. To access the trace `meta` values in an attribute in the same trace, simply use `%{meta[i]}` where `i` is the index or key of the `meta` item in question. To access trace `meta` in layout attributes, use `%{data[n[.meta[i]}` where `i` is the index or key of the `meta` and `n` is the trace index.",
@@ -35429,6 +35565,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "meta": {
      "arrayOk": true,
      "description": "Assigns extra meta information associated with this trace that can be used in various text attributes. Attributes such as trace `name`, graph, axis and colorbar `title.text`, annotation `text` `rangeselector`, `updatemenues` and `sliders` `label` text all support `meta`. To access the trace `meta` values in an attribute in the same trace, simply use `%{meta[i]}` where `i` is the index or key of the `meta` item in question. To access trace `meta` in layout attributes, use `%{data[n[.meta[i]}` where `i` is the index or key of the `meta` and `n` is the trace index.",
@@ -36456,6 +36598,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "lighting": {
      "ambient": {
       "description": "Ambient light increases overall color visibility but can wash out the image.",
@@ -37733,6 +37881,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "lighting": {
      "ambient": {
       "description": "Ambient light increases overall color visibility but can wash out the image.",
@@ -38355,6 +38509,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "dash": {
       "description": "Sets the dash style of lines. Set to a dash type string (*solid*, *dot*, *dash*, *longdash*, *dashdot*, or *longdashdot*) or a dash length list in px (eg *5px,10px,2px,2px*). Note that this style setting can also be set per direction via `increasing.line.dash` and `decreasing.line.dash`.",
@@ -38848,6 +39008,12 @@
       "valType": "string"
      }
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "autocolorscale": {
       "description": "Determines whether the colorscale is a default palette (`autocolorscale: true`) or the palette determined by `line.colorscale`. Has an effect only if in `line.color` is set to a numerical array. In case `colorscale` is unspecified or `autocolorscale` is true, the default palette will be chosen according to whether numbers in the `color` array are all positive, all negative or mixed.",
@@ -39805,6 +39971,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "autocolorscale": {
       "description": "Determines whether the colorscale is a default palette (`autocolorscale: true`) or the palette determined by `line.colorscale`. Has an effect only if in `line.color` is set to a numerical array. In case `colorscale` is unspecified or `autocolorscale` is true, the default palette will be chosen according to whether numbers in the `color` array are all positive, all negative or mixed.",
@@ -41000,6 +41172,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "marker": {
      "colors": {
       "description": "Sets the color of each sector. If not specified, the default trace color set is used to pick the sector colors.",
@@ -41592,6 +41770,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "marker": {
      "blend": {
       "description": "Determines if colors are blended together for a translucency effect in case `opacity` is specified as a value less then `1`. Setting `blend` to `true` reduces zoom/pan speed if used with large numbers of points.",
@@ -42050,6 +42234,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "link": {
      "color": {
       "arrayOk": true,
@@ -43239,6 +43429,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "anim": true,
@@ -45496,6 +45692,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "autocolorscale": {
       "description": "Determines whether the colorscale is a default palette (`autocolorscale: true`) or the palette determined by `line.colorscale`. Has an effect only if in `line.color` is set to a numerical array. In case `colorscale` is unspecified or `autocolorscale` is true, the default palette will be chosen according to whether numbers in the `color` array are all positive, all negative or mixed.",
@@ -47479,6 +47681,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the line color.",
@@ -49300,6 +49508,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the line color.",
@@ -51300,6 +51514,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the line color.",
@@ -53199,6 +53419,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the line color.",
@@ -54364,6 +54590,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the line color.",
@@ -56207,6 +56439,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the line color.",
@@ -58017,6 +58255,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the line color.",
@@ -59858,6 +60102,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the line color.",
@@ -61701,6 +61951,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "marker": {
      "autocolorscale": {
       "description": "Determines whether the colorscale is a default palette (`autocolorscale: true`) or the palette determined by `marker.colorscale`. Has an effect only if in `marker.color` is set to a numerical array. In case `colorscale` is unspecified or `autocolorscale` is true, the default palette will be chosen according to whether numbers in the `color` array are all positive, all negative or mixed.",
@@ -63853,6 +64109,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "lighting": {
      "ambient": {
       "description": "Ambient light increases overall color visibility but can wash out the image.",
@@ -64553,6 +64815,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "level": {
      "anim": true,
      "description": "Sets the level from which this trace hierarchy is rendered. Set `level` to `''` to start from the root node in the hierarchy. Must be an \"id\" if `ids` is filled in, otherwise plotly attempts to find a matching item in `labels`.",
@@ -66469,6 +66737,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "lighting": {
      "ambient": {
       "description": "Ambient light increases overall color visibility but can wash out the image.",
@@ -67362,6 +67636,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "meta": {
      "arrayOk": true,
      "description": "Assigns extra meta information associated with this trace that can be used in various text attributes. Attributes such as trace `name`, graph, axis and colorbar `title.text`, annotation `text` `rangeselector`, `updatemenues` and `sliders` `label` text all support `meta`. To access the trace `meta` values in an attribute in the same trace, simply use `%{meta[i]}` where `i` is the index or key of the `meta` item in question. To access trace `meta` in layout attributes, use `%{data[n[.meta[i]}` where `i` is the index or key of the `meta` and `n` is the trace index.",
@@ -67768,6 +68048,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "level": {
      "anim": true,
      "description": "Sets the level from which this trace hierarchy is rendered. Set `level` to `''` to start from the root node in the hierarchy. Must be an \"id\" if `ids` is filled in, otherwise plotly attempts to find a matching item in `labels`.",
@@ -69085,6 +69371,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "line": {
      "color": {
       "description": "Sets the color of line bounding the violin(s).",
@@ -70869,6 +71161,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "lighting": {
      "ambient": {
       "description": "Ambient light increases overall color visibility but can wash out the image.",
@@ -71708,6 +72006,12 @@
      "editType": "style",
      "valType": "number"
     },
+    "legendwidth": {
+     "description": "Sets the width (in px or fraction) of the legend for this trace.",
+     "editType": "style",
+     "min": 0,
+     "valType": "number"
+    },
     "measure": {
      "description": "An array containing types of values. By default the values are considered as 'relative'. However; it is possible to use 'total' to compute the sums. Also 'absolute' could be applied to reset the computed total or to declare an initial value where needed.",
      "dflt": [],