I have had this monster for around 15 years its 11.5" circumference (4" Dia) x 12.5" tall Yesterday I accidentally slid all the way down it but couldn't repeat. So I just tried again today and managed to slut drop all the way down it and ride. The first time it slid past the bottleneck my whole world turned into rapturous spasmic pleasure, it was almost overwhelming and I was left breathless unable to move as a rolling orgasm kept pushing out of me. Let the good times roll #longtermgoals