OverflowBox
A widget that imposes different constraints on its child than it gets from its parent, possibly allowing the child to overflow the parent.
Example
Container( width: 200.0, height: 200.0, color: Colors.blue[50], child: Align( alignment: const Alignment(1.0, 1.0), child: SizedBox( width: 10.0, height: 20.0, child: OverflowBox( minWidth: 0.0, maxWidth: 100.0, minHeight: 0.0, maxHeight: 50.0, child: Container( color: Colors.blue, ), ), ), ), )