Very nice BCBG MAXAZRIA Black Emanuel Cutout Jumpsuit, Sz Medium... tried on but never worn -in excellent condition !
 
V neck. Sleeveless. Back cut-out detail. Pockets. Wide leg pants. Hidden back zip closure. 
77% Triacetate, 23% Polyester. Contrast is 68% Rayon, 28% Nylon, 4% Spandex. Lining is Polyester.  Machine washable.

Approximate Measurements:  Underarm to underarm is 17.5". Length from shoulder to bottom is 63". Inseam of pants is 31".