Croft & Barrow women's size 18 one piece bathing suit is made of a nylon spandex blend. It has adjustable straps, built in underwire bra and crossover type chest. Underarm to underarm measurement laying flat is 17 inches, and the crotch up the center in the back to the piece where the straps attach is 23 inches. Tags: casual, slimming, colorful, beach, travel, vacation, swimming