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A BJU International study found that the mean girth of an erect penis at mid-shaft is 11.66 cm (4.59 in.), with a standard deviation of 1.10 cm (0.43 in.). How does your girth compare?
Veale, David, Sarah Miles, Sally Bramley, Gordon Muir, and John Hodsoll. "Am I Normal? A Systematic Review and Construction of Nomograms for Flaccid and Erect Penis Length and Circumference in Up to 15,521 Men." BJU International 115 (December 8, 2014): 987-86. Abstract. https://doi.org/10.1111/bju.13010.
Veale, David, Sarah Miles, Sally Bramley, Gordon Muir, and John Hodsoll. "Am I Normal? A Systematic Review and Construction of Nomograms for Flaccid and Erect Penis Length and Circumference in Up to 15,521 Men." BJU International 115 (December 8, 2014): 987-86. Abstract. https://doi.org/10.1111/bju.13010.