A Micropenis is a medical term that describes an unusually small penis in a male, usually 4cm. This condition is incredibly rare. This term is only used when the other parts of the male genitalia, like the scrotum and testes are well developed and normal sized.
About 0.6% of all penis's of all men fall into this category
Joe brown Has a Micropenis. It is 1.5cm in length. He is not a happy camper in the locker room.