US to EU Sock Size Conversion
| US Shoe Range | EU Shoe Range |
|---|---|
| S (4-6) | 35-38 |
| M (7-9) | 39-42 |
| L (10-12) | 43-46 |
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.
Sock sizing is usually sold by a shoe-size range rather than a single number — a US shoe range of 7-9 converts to a EU range of 39-42 on the standard chart, which is why sock packs are labelled 'fits shoe sizes X-Y' rather than one exact figure.
Because a sock's stretch tolerance already covers a range of feet, converting the range itself (rather than trying to pin down one exact number) is the more useful way to use this chart when buying from a European retailer.
Frequently asked questions
Why are sock sizes given as a range instead of one number?
Because knit sock fabric stretches enough to comfortably fit a span of foot sizes, so manufacturers size by shoe-size range rather than by the more precise numbers used for shoes themselves.