Sexy tight nylonspandex 1 shoulder+long flare slv​

One owner worn one time. Very tight black fine Nylon and spandex. Size says large but this would fit a small or a medium. Formfitting and longer at one hip. Sleeve is long and bells out with an open vent. This was bought at a very fine boutique store but it never had the name on the actual tag. I think the red tag was the logo of the store. Pit to pit measures 14 inches but is very stretchy like spandex. Open pit to longest part of hem measures 18 inches. Was dry cleaned.