Vintage 80s Sequins Evening Gown

Super fun vintage dress, no label that I can find but I think it's polyester. It's got shoulder pads, a zip up back with buttons to go over it and cuffed sleeves. There's a small mark on one of the shoulders and a few signs of wear but in great vintage condition. Size: 6-8/M Fabric: I'm guessing polyester Approx measurements when flat: Pit to pit: 18" Waist: 15" Sleeves: 22.5" Shoulders:15.5" Overall length:53"