Yes, you can return it if it doesn't fit. You have 30 days to do so. Just make sure you don't remove any of Yoogi's Closet tags! (this is one way they make sure that their authentic products stay that way if they're returned). I'm not sure if they will return your money and then you have to buy something new, or if you can just ask for a credit. Usually they don't have more than one of the same size or style (because they are consignment), but I trust their business 100% to make sure that they are selling only authentic merchandise.