my first toy ever. when it came in the mail and i opened it i thought it would never fit, the head looked huge! the head is over 2 inches across (6.5 inches around). i thought, ok, i will just use it for external stimulation. anyways, my first time using i got so excited, so i tried to fit it inside. after a minute the head just popped in, and what a feeling! it gave me that great sensation of fullness, and the round head is such a nice shape there was no discomfort. after a year of enthusiast daily use, i never use the vibe function at all, i only use it for thrusting, popping the head in and out over and over and it feels amazing. i only wish there was the exact same toy in a size thicker, as now this one slips in easily and i don't get quite the same feeling of fullness as i did at the beginning. a great toy, i highly recommend as a first time toy.