H&M gold label green halter style sheath cocktail dress

H&M gold label sleeveless cocktail dress Dark green sheath midi dress Keyhole front Sheer mesh panels at back Tag says size 8 but it seems tight so please see measurements Approximate measurements (taken flat): Length- 38 1/2 inches Pit to pit- 15 1/2 inches Waist- 13 1/4 inches Tags- bodycon sheath classic classy wedding guest sheer panels evening cocktail day to night