Vintage sizing is one of the most consistent sources of disappointment for first-time archive buyers — and one of the most easily avoided. The problem is not that vintage clothes are small. The problem is that the numbers mean something different.
Why vintage sizing runs differently
Until the 1980s, European sizing was based on body measurements, not standardised fit blocks. A French size 40 from 1975 corresponds to the actual bust, waist, and hip measurements of a 40cm half-circumference — which translates to roughly a modern size 36-38 depending on the brand and the decade. American sizing of the same era runs even smaller relative to modern equivalents.
Additionally, the silhouettes of earlier decades were constructed with less ease — less extra fabric built into the pattern for movement. A 1970s YSL jacket fits closer to the body than a modern jacket in the same labelled size.
How to measure correctly
Before buying any vintage piece, take three measurements:
- Bust: measure around the fullest part of your chest, arms relaxed at your sides.
- Waist: measure at your natural waist, not where you wear your trousers.
- Hips: measure around the fullest part, typically 20-23cm below the natural waist.
Compare these to the garment measurements, not the label size. At ALE PARIS, every piece is measured flat and listed with actual garment dimensions — bust, waist, hip, and length — so you're comparing fabric to body, not number to number.
Brand-specific patterns
Different houses cut differently. Chanel suits run narrow in the shoulder and short in the sleeve — if you have broad shoulders, size up and have the sleeves let out. YSL Rive Gauche trousers are cut for a longer torso; petite buyers often need significant hemming. Mugler is structured to create a silhouette — the fit is intentional and unforgiving, which is the point.
What can and cannot be altered
A jacket can be taken in at the side seams, but cannot be let out beyond the seam allowance — typically 1.5-2cm on vintage pieces. Shoulders cannot be altered without significant cost and visible risk. Trousers can be hemmed and waistbands can be taken in, but the rise is fixed. When in doubt, buy larger and alter down.
The fit question to ask before buying
Before committing to a vintage piece, ask: what are the actual garment measurements, and what is the seam allowance? Those two numbers tell you everything about whether the piece can work for your body.
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