Based on studies of 15,521 penises, the average length of an erect penis is about 5.25 to 5.5 inches. This means a penis that is 7 inches when erect is in the upper 97th percentile (out of 100 men, it would be among the longest 3 to 5). The average circumference is 4.5 inches.

For the latest and greatest penis-size study from the British Journal of Urology, CLICK HERE.