Backless halter neck silk gown, US 8, fits like 4-6, NWOT

Backless halter neck silk gown by AIdan Mattox in shirred blue chiffon. Empire waist asymmetrical pleated bodice and cups, continuing into the halter strap with two self-covered buttons. Pleats in the center front of the skirt and in center back, with a high slit in the front. Size US/CA 8 but fits smaller, more like US/CA 4-6. The chest under the cups is 14 inches wide laid flat. (I used to be 34A and it fit perfectly. Given the design you can probably fit a larger cup, too.) The bodice is boned, with silicon grip bands in the back. Back zip closure. 100% silk, lining 100% polyester. Dry clean. The color is hard to capture, it's a somewhat lighter shade than in my photos but not as light as the last picture. New, never worn, no tags. Retailed for $500. Perfect for prom, events and parties.