Women's jeans waist (W) to letter size
Enter a jeans waist number to find the letter size to pick for trousers or skirts sold as S, M and L.
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How to use it
- Enter jeans waist size (w).
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
US = 2 × (W - 25), then XS = US 0 and 2, S = 4 and 6, M = 8 and 10, L = 12 and 14, XL = 16 and 18, XXL = 20 and 22. So W25 and 26 = XS, W27 and 28 = S, W29 and 30 = M, W31 and 32 = L, W33 and 34 = XL, W35 and 36 = XXL.
Example
Inputs: Jeans waist size (W) = 29 in. Result: Letter size: M; US size: 8; Waist number in cm: 73.7 cm.
Limits and caveats
- The W number is a label and can differ from your actual waist by several cm depending on the cut and rise.
- Brands vary a lot in jeans, so try on or check the brand chart.
- Covers W25 to W36 only, not W24 and below (US 00).
Questions about this tool
Is a W30 jean a medium or a large?
W30 is a US 10, the fuller end of medium on the common chart.
What letter size is women's jeans size 32?
W32 matches US 14, which is a large.
Is a letter size enough to buy jeans?
Letter sizes are broader than W numbers, so they suit stretch trousers better than fitted jeans. For slim jeans, go by the waist and the L length.