I got a L and I usually get L or XL for my bottom. Yes it seems impossible to get on at first but ladies, its suppose to be tight and I know you can do it, if you worry about it being too small, just get one size bigger and no more trust me:) Im wearing it everyday!! Love it!! It is better than those patted ones cuz it doesn't make your butt hard like a book, the new butt is still you. Don't forget it DOES have a thing that will locate between your butt cheeks, it will press you hard.