Most men believe that theaverage length ofan erect penis is greater than 6 inches (15.24 cm). This belief is due, in part, to several often-cited studies that relied on self-reported measurements, with means of about 6.2 inches (15.75 cm) for heterosexual men and even greater for gay men. Theaverage human male penis size, based on various studies, ranges between 12.9 cm (5.1 in) and 13.92 cm (5.5 in) and doesn't correlate with fertility or number of sexual partners. Claim: The sizeofa man's nose, hands, or feet is a reliable indicator of the sizeof his penis. Origins: A long-lived mistaken belief relates penis size to a visible body part: hand, foot, or nose. While results vary slightly, most studies estimate theaverage to be within this range. In this article, we look at some factsfrom various scientific studies to try and provide a realistic answer to this question. For many, this will offer reassurance about what to expect of theaverage penis size. 15 Fascinating Facts About The Penis: From TheAverageSize To How To Measure Yours Properly. How many men have 7 inches or more?Theaveragesized penis will be smaller than the width ofa dollar bill, which measures 6.14 inches. Unfortunately, general curiosity can sometimes give way to full-on obsession and anxiety about penis size. This can be an unhealthy and often unnecessary fixation, especially because most men who think their penises are too small have perfectly normal-sized penises. Over all countries, theaveragesizeofa penis is about 13.59 cm. The longest ones are 17.61 cm long on average and carried by men in Ecuador. Theaverage length in Cambodia is only 10.04 cm, which is about 6.1 percent of the body height.