The fit couldn't be more perfect. I am 5'7 around 215 pounds I got an XL. I am pear shaped. Meaning my waist is small but I do have a stomach lol. I love making sure things are smooth when I wear skin tight clothing. This item fit perfect!!! The crotch area is big enough to where you don't have to pull the whole thing off the pee or poo! So the opening to me was a god-send! I would say this, depending on how you are shaped this shaper may not work for you. For someone more top heavy I wouldnt say this is for you because of the clips, they will budge out. But other than that. Get your size!!!! If you are heavier in the thighs or stomach go a size up. Dont risk getting it smaller than you actually are.