US to EU Men's Underwear Size Conversion
| US | EU Waist (cm) |
|---|---|
| S (28-30) | 71-76 |
| M (32-34) | 81-86 |
| L (36-38) | 91-97 |
| XL (40-42) | 102-107 |
Sizing conventions vary by brand and by cut — this table shows the standard published conversion. Always check the garment's own size chart when one is available. See how these tables are compiled.
Men's underwear sizing by waist converts from a US letter/inch band (e.g. M, 32-34in) to a EU waist-in-centimetres figure (81-86cm) on the standard chart, the same waist-circumference logic used across this site's other men's garment conversions.
Because underwear fit depends heavily on the specific cut (brief, trunk, boxer), the waist conversion alone doesn't determine rise or leg opening — check the brand's own fit notes for the specific style rather than assuming the converted waist size covers the whole fit.
Frequently asked questions
Is waist size enough to convert men's underwear sizing accurately?
It's the main figure, but not the whole picture — trunk, brief, and boxer cuts fit the same waist size differently through the rise and leg opening, so the specific style still matters.