Example 1: flutter button border radius shape: RoundedRectangleBorder( borderRadius: BorderRadius.circular(18.0), side: BorderSide(color: Colors.red) ), Example 2: circular button in flutter Container( width: 90, height: 90, child: RaisedButton(onPressed: (){ }, color: Colors.deepOrange, textColor: Colors.white, shape: CircleBorder(side: BorderSide.none), child: Text('Login',style: TextStyle( fontSize: 20.0 ), ), ), ) Example 3: circle around icon flutter CircleAvatar( backgroundColor: Colors.white, radius: 30, child: Icon(Icons.add), ), Example 4: circular icon button flutter RawMaterialButton( onPressed: () {}, elevation: 2.0, fillColor: Colors.whit...