Stella McCartney Italy Size 40 Gray Scoop Neck Dress Tie Back Small Medium 4 6

First three photos are stock 88% Viscose / 12% Silk Layflat measurements: Armpit to armpit 17" Length 32" Width untied 22" This is an Italy size 40 That means it could be (in American sizing) a small or medium, size 4 or 6. There is a a string that you tie so the waist could be adjustable. I would just make sure the chest width is ok then it should fit.