Cylinder Sizing

 

Here's a quick guide to choosing the right cylinder for you.

Your proper penis pump length should be 2 - 3 inches longer than your erect penis size. So, if your size is 7 inches when erect, you should use a 9 - 10 inches long cylinder.

 

For the diameter, you should give at least 1/2 inch of allowance around your shaft.

  1. First, measure the size of your girth (when erect). Wrap a measuring tape around the thickest part of your shaft and mark where the tape meets to get the circumference of your penis.
  2. Divide that length by 3.142 and the result will be the diameter of your penis.
  3. Chose a cylinder that is around 1/2 inch bigger than the diameter of your penis.

Diameter of the Cylinder

CM

INCH

4.4

1.75

4.9

1.93

5.9

2.32

6.35

2.5