NWT, but does not have interior label. Purchased from sample sale, so there is no interior tag to confirm size. Fits like a large, based on size guide from Lisa Says Gah website. The Erin Tank is a form fitting, sleeveless tank top with side ruching tie details and an asymmetrical hem. Featured in a crinkle fabric in a red pepper color. 85% Rayon, 15% Spandex Hand wash cold, Lay Flat to Dry Imported Models wear a size S and L Garment has at least 4 inches of stretch