Tried 8 in store and it was tight across the ribcage. Bought a 10 off Poshmark and it’s a little loose​,​ but it’s comfortable and very elegant. Love the cut and how you can unbutton to create different looks! It’s polyester BUT it doesn’t wrinkle​,​ which makes it a low maintenance staple piece.＜abbr＞Sezane​,​size 10​,​​,​5'5-5'6 5'5-5'6​,​Dress​,​French Brands​,​Size 10 All Reviews​,​Sezane＜​/​abbr＞