Biggest penis on record was measured at 13" by a doctor in Europe during the 1800's. This is not a reliable source due to no pictures, no measurements made on record, more or less hearsay. The biggest penis I have ever witnessed was __________ an I believe he is around the 11" mark. Officially, on record, measured in a medical experiment was a man who took part in the Kinsley Study and measured 9" x 6".