What is the average male pen size in America?
Guidelines that most doctors follow when helping someone decide if they need treatment state that the average size for a flaccid penis is 8.8 cm (3.5 in) , while the average size for an erect penis is 12.9 cm (5.1 in).
How big is the average male pen?
The average stretched penile length (SPL) for adult males is 5.25 inches. An SPL of 3.67 inches or less indicates an adult micropenis. The average SPL for a newborn is 1.4 inches.