Thoughtful man with tattoos thinking about average penis size The study also found that the size of a man's erect penis was not correlated with the size of his.
Research says the average length is 3.61 inches for a flaccid penis and inches, while the average length of an erect penis is 5.16 inches.
A clothed man sitting on a stool with his legs spread apart Research has found the average erect penis size varies from around 13cm to 18cm (5in to 7in).
Scientific studies have been performed on the erect length of the adult an average erect penis length of 12.9 cm (5.1 in) was measured.
Statistically speaking, most guys have a normal penis. A 2015 study of 15,521 men found that the average erect penis size is 5.16 inches long (13.12 cm).