What is the best way to handle with screen sizes in Flutter? You can use the BuildContext context with a MediaQuery to get the current devices screen size and can set the size of your widgets based on that value.
// set width to 40% of the screen width
var width = MediaQuery.of(context).size.width * 0.4;
// set height to 40% of the screen height
var height = MediaQuery.of(context).size.height * 0.4;
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