Penis Development: Penis length in a prepubertal male varies greatly. At puberty (starts typically between ages 9-14), the genital area will grow hair, the testicles will enlarge and the penis will grow in length and width. By the end of the puberty cycle in males, the average penis size will be 5.16 inches. Of course, variability is found in each individual. There will be men with larger or smaller penises.
Answered 1/29/2021
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