This set comes as a whole lot. All pieces interchangeable. Mini skirt cover up is a medium. But stretches. Bikini bottom(L) is full coverage over the tush and no pilling (see picture). Bikini top is a large and chest measurement is 16in without stretching. Tankini top is a Large. Has supported cup to wear strapless but also comes with an adjustable strap. Measurement from top to bottom is 16in and side to side chest is 15.5 in without stretching. ALL PIECES COME TOGETHER