New without tag. Stretch panel in the back. Refer to the size chart in photos. Measurements when laid flat, without stretching. Pit to pit: 15" Waist: 13" The stretch panel adds a lot of stretch, best to follow the size chart. Thicker woven fabric, silk accents. The straps are not adjustable but are stretchy. The details Back smocking, non-adjustable straps. Back zipper and bra friendly. This is made with a deadstock fabric so colors may vary. This is a deadstock woven fabric made from 78% Polyester, 20% Rayon, and 2% Spandex. Dry clean only.