'City Stretch Crepe Jumpsuit' from Universal Standard. Basic (never boring) black jumpsuit with invisible zipper front. Sleeveless with a V-neck, it also features a slim fit through the chest, with shaping bust darts, a relaxed fit through the body and a wide leg. Subtle pockets have a zipper so they don’t spread open as you move about your day. Flowy fabric with drape and stretch. 60% recycled polyester/35% polyester/5% elastane, machine wash. New with tags and flawless! Retailed for $198.

Size: Universal Standard size M fits an 18/20 or 2X. See the last pic for their size chart!
Bust: about 49" (measured flat then doubled)
Waist: 52"
Hips: 60"
Inseam: 27"
Length: 58" from shoulder