Sezane Sizing: Does Sezane Run Small, Big or True to Size?

Sezane sizing is style-specific, not one universal 'runs small' or 'true to size' rule. The brand's official trousers and jumpsuits chart maps French sizes 32 to 48 to U.S. sizes 0 to 16, alongside letter sizes XXS to XXXXL and a separate denim-number column. Waist and hip measurements matter most when choosing trousers. Treat the chart as a conversion tool, then use each product's own note: Ramy and Ari recommend a usual size, Marc and Blimis point to the larger size if between, and Salvatore, Joseph, Mirella, Samuel, Alessia, and Esther point to a smaller size if between. Marielle and Oriana also recommend the usual size. The trouser styles here have different rises and inseams, the jumpers include several yarn blends and a sleeveless cut, and the dresses vary from knit to smocked to short. Use the garment length and the rise that match your wardrobe rather than expecting one size to fit every silhouette.

Start with trousers, where a small difference in rise can change the whole fit. Ramy Pant is high-rise with a tie panel and an 83 cm inseam, and Sézane says to choose your usual size. Marc Pant has a folded yoke and removable belt; if you are between sizes, its note favors the larger one, and the inseam is 82 cm at size 36. Ari Pant is a high-rise straight wide leg with side adjusters, and its note also points to your usual size. Salvatore Pant is low-rise and wide-leg with a removable belt; the brand recommends the smaller size when you are between two. If you already own high-waist trousers that fit, compare their waistband and rise with Ramy or Ari before deciding. For Marc and Salvatore, follow the explicit between-size advice before using a general chart conversion. The product-page inseam notes are more helpful than guessing from a model photo, especially if you want a particular break at the shoe.

With knitwear, the fiber blend and layering plan matter as much as the label size. Joseph Jumper is a long-sleeved baby-alpaca sweater with a removable scarf; the page advises the smaller size if you are between sizes. Marielle Jumper mixes merino wool and super kid mohair and recommends your usual size. Mirella Jumper combines merino wool with organic cotton, and its note points to the smaller size when between sizes. Samuel Jumper is sleeveless, with baby alpaca and merino wool, and also recommends the smaller size when you are between sizes. Those differences are why I would not use one sweater as a measuring proxy for all four. Measure chest and shoulder against a knit you wear over the same base layer, and consider whether the removable scarf or sleeveless shape adds bulk. If you prefer a relaxed fit, the usual-size pieces have a different instruction from the styles where the brand suggests sizing smaller.

The dress notes underline the same point: one label size will not predict every silhouette. Alessia Dress has a smocked back and a 109 cm length at size 36; its note recommends the smaller size if you are between sizes. Oriana Dress is a sleeveless long knit with a crossed back and a 125 cm length at size S, and its note says to choose your usual size. Esther Dress is a short printed style with an 88 cm length at size 36 and a smaller-size recommendation when between sizes. Blimis Dress is sleeveless and short, with a listed 84 cm length at size 36; it is the one that points to the larger size if you fall between. Buy when the measurements and the item's note agree with how you want it to fit; pause when the length or rise is unfamiliar. Sézane's chart gives a conversion, while the product note resolves a between-size choice. I would start with Ramy or Ari if you want a trouser with a clear rise and inseam, then choose the dress whose listed length makes sense for your height.