Enter your penis measurements
and see how each pump fits you

Your pump should be 2–3 inches longer than your erect length. For example, if your penis is 7 inches long, choose a 9–10 inch cylinder.

Wrap a measuring tape around the thickest part of the shaft. This gives you your circumference.

Choose a cylinder that's at least ½ inch wider than your diameter to allow room around your shaft.