I ordered a small. Could barely clasp it up all the way. This thing is TIGHT lol. Ive been wearing it a couple days and its starting to get easier to clasp. So I guess thats a good thing. Good luck eating in this thing though lmao. I can only wear it three to four hours at a time for now. Will update to five stars after a couple weeks if I start to get a noticibly smaller waist line.