How far can you move buttons to alter the girth of a suit jacket?
For double breast, are you saying per row 1/4 in total, i.e. 1/8 inch per button OR 1/4 inch per button OR 1/4 inch for one column of buttons?
As I look.. a 1/4 in is nothing and shows very, very little difference. You are in essence saying don't move buttons?you move the front edge of the coat 1/4 inch. then move the buttons to where the keyhole of the button hole is at.