Micropenis refers to an adult penis that measures under 3 inches (7.5 centimeters) when fully stretched. Medical treatments can increase its size, but a micropenis functions like a longer penis does.
Medically reviewed by Jamin Brahmbhatt, MD Key Takeaways A micropenis is a smaller than average penis that measures less than 3.67 inches when stretched. It is a rare condition caused by problems with ...