## Get Width and Height of a Widget

In Flutter, you can easily get the size of a specific widget after it’s rendered. What you need to do is to give it a key, then using that key to access currentContext.size property, like this:

final _key = GlobalKey();

// This function is trggered somehow after build() called
void _getSize() {
final _size = _key.currentContext.size;
final _width = _size.width;
final _height = _size.height;
}

Widget build(BuildContext context) {
return Scaffold(
child: SomeWidget(
key: _key,
);
}