Answers for "sized box border flutter"

flutter container border

Container(
  decoration: BoxDecoration(
    border: Border.all(
      color: Colors.red,  // red as border color
    ),
  ),
  child: Text("Your text...")
)

giving a cotainer a border color

Container(
      child: Text(
          'This is a Container',
          textScaleFactor: 2,
          style: TextStyle(color: Colors.black),
      ),

      decoration: BoxDecoration(
          borderRadius: BorderRadius.circular(10),
          color: Colors.white,
          border: Border(
              left: BorderSide(
                  color: Colors.green,
                  width: 3,
              ),
            ),
          ),
      height: 50,
     ),