While we've never actually stopped and measured we estimate the biggest Jennifer has had was about 10.5 to 11 inches in length and about 2.5 inches in diameter from base to tip. Cut with a ball sack just as large. We were at a resort celebrating Jennifer's 39th Birthday and he was our waiter at dinner. he was flirting a lot with Jennifer and she gave him our room number and asked him to join us after his shift ended.