Revolve x Norma Kamali Sleeveless X Straight Leg Black Jumpsuit. Per Revolve: "Strappy back design. Pull-on styling. Lightweight jersey fabric." Boat neck. Criss cross straps in back. Has stretch. Size Large. Condition is New with Tags, no visible flaws.

Approximate flat lay measurements:

Underarm to underarm: 16"
Shoulder to bottom of hem: 62"
Inseam: 33"