FlutterView.display.size tells you the resolution of the display on supported platforms. FlutterView.physicalSize tells you the view size, which may be different from the display. This can help you tell if you are being letterboxed on android. 

https://medium.com/flutter/developing-flutter-apps-for-large-screens-53b7b0e17f10

Related to [flutter/website/9896](https://github.com/flutter/website/issues/9896)