We use CircleBorder as shape property of a MaterialButton to create a circular button in Flutter. Wrap the button with a fixed size Container to adjust its height and width.

import 'package:flutter/material.dart'; class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState(); } class _HomePageState extends State<HomePage> { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Circular button'), ), body: SafeArea( child: Center( child: Container( width: 150, height: 150, child: MaterialButton( shape: CircleBorder(side: BorderSide(width: 1, color: Colors.blue, style: BorderStyle.solid)), child: Column( mainAxisAlignment: MainAxisAlignment.center, children: [ Icon(Icons.perm_identity, color: Colors.white), Text("Profile"), ], ), color: Colors.blueAccent, textColor: Colors.white, onPressed: (){ print('clicked'); }, ), ), ), ), ); } }