thsee are some properties u can simply give to design the text field

width : container width , height : container height , color1 : user input font color , color2 : for lable and hint text , lable : test lable , hint : hint Text , size : font size for lable, user input and hint , padding : EdgeInsets widget for padding ,

Column(
  children[
    simpletextfield(
      width: 200,
      height: 40,
      color1: Colors.red, // color for user input
      color2: Colors.yellow, // color for lable and hint Text
      lable: 'Exp',
      hint: 'Exp',
      size: 25, // for input, lable and hint
      padding: EdgeInsets.all(20),
    ),
  ]
);

Libraries

makingwidgetsimple