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

Sézane is not uniformly small or true to size; the safest first step is its French size chart, followed by each garment's fit notes. If you are asking, does sezane run small, the evidence says fit varies by category, not just by label. On Sézane's U.S. chart, French 34 maps to U.S. 2, 36 to 4, 38 to 6, 40 to 8, 42 to 10, 44 to 12, and 46 to 14. The chart also separates denim waist sizes from the standard clothing conversion, so jeans need their own check. Camille's sizing guide says sweaters feel true to size but are cut slimmer than many U.S. styles, while denim fit varies by style. That distinction matters: a fitted merino dress and a wide-leg jean ask different things of your waist and hip measurements, even if both use French sizing. I would start with your body measurements rather than a guessed conversion, then check garment length, ease and shape before choosing. Compare a similar garment you own, especially shoulder width on knits and rise or inseam on jeans.

Denim is where I would read the cut description rather than assume all four pairs fit the same way. Le Crop is high-rise, wide-leg and slightly flared, with a 7/8 length; its page lists a 68 cm inside leg. Le Flare Jeans are also high-waisted but have a more pronounced flared leg and an ankle length. Le Droit Vintage Jeans use a high waist and a straight cut, while Le Barrel Jeans pair a high waist with a slightly rounded wide leg. Those product details make clear why one brand size may feel different between these shapes. Sézane gives denim its own U.S. waist-number conversion, separate from the standard dress chart. I would use that denim table first, then compare the inseam with jeans in your closet. When between sizes, decide whether you want a closer waist fit or a looser drape through the leg, and use measurements rather than ordering an identical size in every silhouette.

Knits range from a narrow line to generous volume, so one successful sweater size is not a guarantee. Jeanne Jumper is a long-sleeved super kid mohair and merino wool sweater with voluminous structured sleeves. Marielle Jumper is a long-sleeved merino-wool and super-kid-mohair sweater with a round neckline and drawstring cuffs. Mirella Jumper is a ribbed merino-wool and organic-cotton sweater with a sailor collar and button placket, while Samuel Jumper is a sleeveless baby-alpaca and merino-wool sweater with a round neckline. Sézane's chart translates French sizing for knitwear as well, while Camille's guide says sweaters tend to feel true to size but are cut slimmer than many U.S. styles. That is a useful starting point, not a promise that every shape fits identically: Sézane recommends your usual size in Marielle, while it advises the smaller size if you are between sizes in Mirella or Samuel. Compare shoulder and chest measurements with a sweater you own, then think about how much room you want for a shirt underneath. For a closer fit, be especially attentive to your chest and shoulder measurements; for layering, use the garment's stated shape rather than the brand name alone.

Dresses are a useful final check because Sézane uses French size labels across very different shapes. Blimis is a sleeveless short viscose dress with a waist seam, decorative buttons and a back zip; Lorette is a fitted midi in merino wool and organic cotton. Pippa Short Dress is a short-sleeved organic-cotton style with a side tie, while Tiphaine is a merino and organic-cotton knit that fits close at the bust and waist before flaring. The official dress chart maps French 34 to 46 to U.S. 2 to 14, but it is still worth measuring chest, waist and hip rather than relying on one label. Sézane says U.S. customers get one free first return per order within 30 days, with final-sale Archives items excluded. I would test fit first in a returnable piece and leave archive final-sale options for a size you already know. In short, fitted knits and dresses deserve careful measurement, while roomier legs and A-lines offer more ease; the chart plus a product's shape note makes the decision more informed.