Big mistake   There appears to be an error in one of the quoted measurements I quote  A  Study Penile measurements in normal adult Jordanians and in patients with erectile dysfunction The purpose of this work was to determine penile size in adult normal group one  and impotent group two  In group one mean midshaft circumference was  cm mean flaccid length was mean  cm and mean stretched length was  cm In group two mean flaccid length was  cm and mean stretched length was  cm  The cm figure cannot be right its nearly a metre