Isabel Marant Etoile cream and black tweed jacket size 2/4

EUC tag says size 40 but see measurements; fits very small. I’m a size 6/8 typically in blazers. Perfect french girl, Parisian style Blend of cotton, polyester, acrylic Unlined Pit to pit: 17 3/4 inch Shoulder to wrist 23 3/4 inch Back length 20.5 inch