diff --git a/svx/source/tbxctrls/itemwin.cxx b/svx/source/tbxctrls/itemwin.cxx
index de7c5bbae3a3..72c416944af2 100644
--- a/svx/source/tbxctrls/itemwin.cxx
+++ b/svx/source/tbxctrls/itemwin.cxx
@@ -248,9 +248,7 @@ SvxMetricField::SvxMetricField(
     , ePoolUnit(MapUnit::MapCM)
     , mxFrame(rFrame)
 {
-    Size aSize(GetTextWidth( "99,99mm" ),GetTextHeight());
-    aSize.Width() += 20;
-    aSize.Height() += 6;
+    Size aSize( CalcMinimumSize() );
     SetSizePixel( aSize );
     aLogicalSize = PixelToLogic(aSize, MapUnit::MapAppFont);
     SetUnit( FUNIT_MM );