Incredible rare vintage guess collection asymmetrical ruched floral open back

This dress has the most stunning shape! Ruched stomach and then flared skirt. Open back high neckline and button front with cutout Polyester spandex High quality stretchy fabric Size medium 13 inches across underarms 13 inches across waist plus approx 2-3 inches stretch 38 inches shoulder to bottom 8 inch arm opening Guess collection by Marciano designer May show minor signs of wear consistent with age but overall great condition