Reduce AW.UI.Button size

I am using AW 2.5,here i have AW.UI.Button within grid cell,the button occupied the whole cell spce.so,it's not looking like a button. i have tried to reduce the size of the button,but it seems button cell size has reduced and the grid not looking better.becauze the grid cells not arranged properly.

var myInput = new AW.UI.Input;
myInput.setStyle('width', '80%');
myInput.setStyle('height', '70%');