The height of your sissy bar is totally up to you. There is no rule that you have to follow concerning the height. To measure a sissy bar, there are a few measurements you need to take. First measure the width. This measurement should be taken at the bottom of the sissy bar and you are measuring from the outside to outside of the bar. To measure the height of the sissy bar, measure from the bottom bolt hole to the highest part of the sissy bar. Depending on your application you may need to measure your side straps. Side strap brackets are model specific. Measure the side strap by measuring from center point to center point of the two holes at the bottom of the side strap.