I should have know better. I'm small up top but my waist to thigh ratio is a little wider and I have a little bottom belly pooch. Needless to say it did not zip up. Im 5'6 and 143 lbs. small up top. 29-30 inch waist. And a regular juicy booty lol. Since the material is not stretchy, Id go a size up if u don't have the flattest of stomachs and ur booty is round. Im giving mine away cause paying to return it isn't worth it.