Purchased at a department store and worn for about 2 hours at a wedding party. Home cleaned. Size is M (9), but I usually wear a size S (7) dress. My tops are size M. The back has a lace-up design, so the waist can be adjusted for those with a smaller frame. I think the size will be fine for those who are M to L. It can be worn as a tube top or with shoulder straps. It has tulle and a lining. It's navy blue, so it's an elegant formal dress. Sleeve length: Sleeveless, maxi length, one-piece dress Cocktail, evening dress Color: Blue, Navy Pattern/Design: Solid, satin Wedding, reception, after-party, outfit change