Victoria Sexy Women's Bandeau Bikini Swimsuit Beachwear Bathing Suit Black Size M S(=AU XS) Bust 70, Cup AB, Waist:24"-26.5", Hip:33"-35" M(=AU S) Bust 75, Cup BC, Waist:26.5"-28.5", Hip:35"-37" L(=AU M) Bust 75-80, Cup CD, Waist:28.5"-30.5", Hip:37"-39" Usually we suggest you choose the larger than normal size, for example, you are usually size M, perhaps the size L is best for you. 80% nylon, 20% spandex, 2-4cm difference can be caused by the ways of measurement