This is the “Harriet” crochet dress by Isabel Marant Etoile. The size tag is missing but this was purchased as a French size 34, which is equivalent to US size 2. It measures 32” in length, armpit to armpit 15.5”, waist 15”. It was seen on Anastasia Steele (played by Dakota Johnson) on Fifty Shades Freed. This dress is in excellent condition! Thanks for looking!!