Since we all tend to measure things, I am currently using some kind of strings to well, get the length and measure the length of the string part my penis matches. Quite easy to do and save. Currently I am wondering why shouldn’t I cut off some strings and well save them. You know by getting some kind of a cm I am about wow its a cm. I am such lucky. But how about having a 16cm string, a 17 cm string, a 18cm string and well use them. who cares about mm? And also you can come back like wow my head of the penis is lurking that much over the string being as long as my penis was when I had started… .