Fits perfect into a beginners wifes sexy butt well decided to try some alternative play during masturbation when not with my slave only real draw back is it button that controls the sensations is on the side the fits inside your bottom but there are some very nice sensations to be had from this toy if you wish to explore prostrate play during masturbation so its good but with some teething issues upon design but does feel nice and comfortable not too large the wife loves it at fist she was a bit shy but she loves it now use it every time