Where the snap closure is on the neckline it has come unsewn. The pieces are both there, See photos.
Women's size 0 H&M sleeveless striped one piece jumpsuit is made of polyester. It has two pockets and an attached belt. There is a zipper closure in the back.
It measures 15 inches underarm to underarm, 23 inch inseam, and 51 inches shoulder seam to bottom hem.