Its hard to measure on a curve...Hydromaxm, that sounds kind of funny. Anyway, I always measured from the side, centering it at the base and the glans. Now I measure from the top. I was really too curved until I started doing erect bends. I've probably took out about half of the curvature, and I'm going to leave it at that, cause my wife says she likes it the way it is. I've gone from banana to pickle, is how she put it. Pickle is better, apparently.