HASIDING Criss Cross Competitive One Piece Swimsuit Bathing Suit 80% nylon+20% elasthanne Racing leg height Sporty one-piece swimsuit with large keyhole on back Narrow racerback straps, and large trimmed cutout Flyback styling that won't bind or gap for ideal fit Size S suitable for bust 28-29"/under bust 23-25";Size M suitable for bust 30-31"/under bust 26-27";Size L suitable for bust 32-33"/under bust 28";Size XL suitable for bust 34-35"/under bust 29-30";Size 2XL suitable for bust 36-37"/under bust 31-32";Size 3XL suitable for bust 38-39"/under bust 33";Size 4XL suitable for bust 40-41"/under bust 34-35";Size 5XL suitable for bust 42-43"/under bust 36-37"