Tie Bar Square Cuts. Tie Bar length is 1 3/4 inch. Tie bars are meant to keep your tie in place. The most recommend placement of the tie bar is between third and forth button from the top of your dress shirt. Do not place a tie bar any higher than the second button and do not place it any lower than the forth button. One thing that is very important while you chose a tie bar is to make sure the tie bar’s width is shorter than the width of your tie. It looks more elegant and put together that way.