buttonMinSize property
Minimum button size for all buttons.
Applies to TextButton, ElevatedButton, OutlinedButton and
ToggleButtons, and the legacy deprecated/removed buttons
RaisedButton, OutlineButton and FlatButton and to MaterialButton.
If undefined and ThemeData.useMaterial3 is false,
defaults to kButtonMinSize = Size(40, 40).
If undefined and ThemeData.useMaterial3 is true,
defaults to Size(64, 40).
Implementation
final Size? buttonMinSize;