Maximum penis length

The official rank of the largest penis belongs to a man measured and documented by Dr. Robert Dickinson in the earlier part of the twentieth century. This record-holding penis was 13.5 inches (34 cm) in length and 6.25 inches (16 cm) in circumference.

But the living owner of the world's biggest human penis is Jonah Falcon. Falcon's 13-5 inch member has been measured for a TV special, making him one of the few guys who can back up his bodily boasts.