VonFon Strapless Push-Up Top & Side-tie Bikini Bottom Women Swimwear Beach Wear Material:82% nylon + 18% spandex Ties at back and neck,adjust the size all by yourself. XS:Bust 32"-34"; Hip:34"-35"; Wrist:24"-25" S:Bust 34"-35"; Hip:36"-39"; Wrist:25"-27" M:Bust 36"-38"; Hip:39"-40"; Wrist:28"-29.5"