The average penis size is inches, according to a study of men. ( %) have a 9-inch penis; and % of guys have a penis larger than 9 inches.
Human penises vary in size on a number of measures, including length and circumference One study found the mean flaccid penis length to be inches ( cm) A review of several studies found average flaccid length to be 9–10 cm The study of 15, men, found that the average length of a stretched flaccid.
Women rate men with larger penises more attractive, but the returns on bigger genitals start to decrease at a flaccid length of inches (
Hung A Meditation on the Measure of Black Men in America. which state that the average length of the erect adult penis is roughly inches.