The study also found that the size of a man's erect penis was not correlated with the size of his flaccid penis. This means that men whose penises are different lengths when flaccid may have similarly sized erect penises. There was also no relationship between the men's ages and their penis sizes. The finding on how much the penis length can 'grow' — on whether you are a 'shower' or a 'grower' — was further supported by a studyof 200 Turkish men, in which "flaccid length had little importance in determining erect penile length." The research to determine average penis size includes a study published in January 2014 that examined over 1,600 American men, although it did not take independent physical measurements.
Instead, the study relied on the men's own measurements of penis size. The reports may be considered fairly reliable, however, since the men were to be given condoms to match their self-reported measurements, meaning that any inaccuracy would have resulted in ill-fitting prophylactics. This study found the average penis size to be as follows: Average size for an erect penis is 14.2 cm (5.6 inches)Average circumference of an erect penis is 12.2 cm (4.8 inches). The researchers said the self-reported erect penile dimensions were consistent with findings from other studies. Their study added the finding that the precise dimensions of an erection can be influenced by the mode of getting aroused, such as whether a man uses hand stimulation. To measure penis length, press a ruler into the groin and measure from the base of the penis to the tip. To measure penis girth, wrap a measuring tape around the widest part of the penis.