I'm 163cm (5'4) and I usually get 38 (US 6) on the bottom and 36 (US 4) on the top. I got the M for the Mattia. Mattia is softer than I expected (which is positive). I think this goes well with many of my shirts​,​ did not yet try with knits. I also got the Naella and like the Naella​,​ perfect fit​,​ comfy and soft and feels good quality ​/​ shape. Rym Shirt in Ecru - got the 36 (US 4) which is my usual size. Lovely!! Soft fabric and color​,​ perfect fit.＜abbr＞Sezane​,​M​,​$160​,​5'3-5'4 5'3-5'4​,​Blouse​,​Bottoms​,​French Brands​,​Size 4​,​Size M​,​Skirt​,​Tops All Reviews​,​Sezane​,​Skirt​,​Top＜​/​abbr＞