diff --git a/src/slic3r/GUI/Widgets/DropDown.cpp b/src/slic3r/GUI/Widgets/DropDown.cpp
index fefd77e89e..c5f47062fb 100644
--- a/src/slic3r/GUI/Widgets/DropDown.cpp
+++ b/src/slic3r/GUI/Widgets/DropDown.cpp
@@ -89,7 +89,10 @@ void DropDown::SetSelection(int n)
         n = -1;
     if (selection == n) return;
     selection = n;
-    messureSize();
+    if (need_sync) { // for icon Size
+        messureSize();
+        need_sync = true;
+    }
     paintNow();
 }