diff --git a/lib/matplotlib/backends/backend_gtk3cairo.py b/lib/matplotlib/backends/backend_gtk3cairo.py
index 1da8419e5381..b9f3545cbda3 100644
--- a/lib/matplotlib/backends/backend_gtk3cairo.py
+++ b/lib/matplotlib/backends/backend_gtk3cairo.py
@@ -17,6 +17,8 @@ def on_draw_event(self, widget, ctx):
                 self.get_style_context(), ctx,
                 allocation.x, allocation.y,
                 allocation.width, allocation.height)
+            self._renderer.width = allocation.width * scale
+            self._renderer.height = allocation.height * scale
             self._renderer.dpi = self.figure.dpi
             self.figure.draw(self._renderer)
 
diff --git a/lib/matplotlib/backends/backend_gtk4cairo.py b/lib/matplotlib/backends/backend_gtk4cairo.py
index d57f53fb28d6..8f56bd6b2a33 100644
--- a/lib/matplotlib/backends/backend_gtk4cairo.py
+++ b/lib/matplotlib/backends/backend_gtk4cairo.py
@@ -19,6 +19,8 @@ def on_draw_event(self, widget, ctx):
                 self.get_style_context(), ctx,
                 allocation.x, allocation.y,
                 allocation.width, allocation.height)
+            self._renderer.width = allocation.width * scale
+            self._renderer.height = allocation.height * scale
             self._renderer.dpi = self.figure.dpi
             self.figure.draw(self._renderer)