//TableRow class in Flutter doesn't has height attribute. But the height of the TableRow is the maximum of the intrinsic height of all its children's.
//For example, you can has sizedBox classess for all TableCell classes inside the Table Row:

TableRow(
    children: [
        TableCell(
            child: SizedBox(height: 5,),
        ),
        TableCell(
            child: SizedBox(height: 5,),
    ),
]),