Penis sizes range in terms of length and circumference, and this article The study also found that the size of a man's erect penis was not.
Research says the average length is inches for a flaccid penis and inches for an erect penis. We'll explain how to measure your penis.
Some men go to extreme lengths to try to increase the size of their penis. Research has found the average erect penis size varies from around 13cm to 18cm.