TabBar 텍스트 커스텀 TabBar( indicatorColor: Colors.white, labelStyle: TextStyle(fontSize: 22.0,fontFamily: 'Family Name'), //For Selected tab unselectedLabelStyle: TextStyle(fontSize: 10.0,fontFamily: 'Family Name'), //For Un-selected Tabs tabs: [...]); 참고 : https://stackoverflow.com/a/54760543/3897810