diff --git a/pandas/core/interchange/column.py b/pandas/core/interchange/column.py
index d28da1158134e..13154c0e55900 100644
--- a/pandas/core/interchange/column.py
+++ b/pandas/core/interchange/column.py
@@ -81,7 +81,8 @@ def __init__(self, column: pd.Series, allow_copy: bool = True) -> None:
         self._col = column
         self._allow_copy = allow_copy
 
-    def size(self) -> int:  # type: ignore[override]
+    @property
+    def size(self) -> int:
         """
         Size of the column, in elements.
         """