Measured as per graphic. I measured 4.25" exactly, ordered the mediums hoping they would be a little loose. Instead they are actually tight. Very little, if any dowelling. So I'm still getting some pressure/friction at the very top of finger openings. You may want to go a size up. I'll see if these "break in" to loosen up. If not, I'll probably, try another grip company. To be honest, a little disappointed, as I finally shelled out on a good set of grips.