Vintage dress with starburst embellishment, size M, in EUC

Understated glam. Laid flat, approximately 41” long, 23” sleeves, 20” pit-to-pit, 17” waist. Because of these measurements I think it’s not a 12. Black lining. All buttons and snaps are intact. The purple tag is from the dry cleaners. From a smoke- and pet-free household.