And unlike many clothing stores, Amazon doesn't allow directly exchanging an item to change size. Instead, they treat an exchange as a refund followed by a new

And unlike many clothing stores, Amazon doesn't allow directly exchanging an item to change size. Instead, they treat an exchange as a refund followed by a new purchase (at the then-current price). When something is on sale, the discount may no longer apply by the time you go to exchange it—so if you're at all uncertain about the size you're better off ordering one of each up front, and then returning the ones that don't fit.