After removing allowFontScalingSelf parameter used in old project everything looks big

[onguc]

I bought a previously written project. However, in the version used in the project, the allowFontScalingSelf parameter has been removed in new versions. When I removed this parameter, the text and icons started to appear too big. Any ideas on solving this?

Previous Icon Size:

New Icon Size:

Thanks in advance

[onguc]

I found the reason. Dimensions may be calculated differently in the old version and different in the new version. I fixed the problem by giving designSize the physical size of the device as below:

Widget build(BuildContext context) { 
    var physicalScreenSize = window.physicalSize;
    var physicalWidth = physicalScreenSize.width;
    var physicalHeight = physicalScreenSize.height;
    return ScreenUtilInit(
        designSize: Size(physicalWidth, physicalHeight),
       ...
  }