Vfemage Black Dress w/ White Pattern EUC

This patterned dress from Vfemage is in excellent condition. Tag says size 12, but after researching, it's apparent it's a UK size, which would be a US size 8. My mannequin is a 12, and it is too tight on her (see pics). --no material tag, feels like polyester & Spandex --cap sleeves --faux leather detail --knee length, depending --fabric is stretchy --left side zipper —static pattern Approx measurements: --between underarm seams: 17.5" --length: 39" Pics are part of description. (Area 26)