How to customize tabbar width in flutter?

TabBar(isScrollable: true)

Makes a scrollable tab bar. it’s useful when your tab text content or number of your tabs doesn’t fit into display size.

or maybe you can do something like this:

child: TabBar(
            tabs: [
              Container(
                width: 30.0,
                child: Tab(text: 'hello'),
              ),
              Container(
                  child: Tab(text: 'world'),
              ),
            ],
          )