The Paris-based National Academy of Surgery released a study saying a "normal" penis should be between 9 and 9.5 centimeters (3.5 to 3.7 inches) when flaccid and between 12.8 and 14.5 centimeters (5 to 5.7 inches) when erect, and with a girth between 8.5 and 9 centimeters (3.3 to 3.5 inches) flaccid and between 10 and 10.5 centimeters (3.9 to 4.1 inches) when erect, in circumference.
The Local - It's official: French docs reveal 'normal' penis size