I have just picked this up, as I had the B7. Thought the B-7 was large before, but it just slipped out too easy. So I thought, hey lets try the next size up. Well! Let me tell you, its a 3 stage jump. 6 circumference to an 8.5 Got worked up with my 7.5 x14 dildo, and man, when the first one pops in for the first time Omg! Bear down and enjoy but lube it well. Pushing down i got to the second one, and that was it. Tried the second time and it s like pushing a baby in reverse. Its long, smooth, and one hell of a ride past the bumps in the bum.