Enter your shoe size to find your sock size.
This sock size converter finds your correct sock size (S, M, L, XL) based on your US shoe size for men and women. Socks are sold in size ranges rather than exact sizes because knit fabric stretches across a band of shoe sizes without losing support or comfort. One "Large" sock can comfortably fit shoe sizes 9.5 through 11 — which is why buying the "wrong" sock size in the middle of a range still works fine, but buying one size entirely off does not.
Men's Sock Size Chart by Shoe Size
| US Shoe Size | Sock Size |
|---|---|
| 4–6 | Small (S) |
| 6.5–9 | Medium (M) |
| 9.5–11 | Large (L) |
| 11.5–13 | X-Large (XL) |
| 13.5–16 | XX-Large (2XL) |
Women's Sock Size Chart by Shoe Size
| US Shoe Size | Sock Size |
|---|---|
| 4–6 | Small (S) |
| 6.5–9 | Medium (M) |
| 9.5–11 | Large (L) |
| 11.5+ | X-Large (XL) |
Sock Size by Type
| Sock Type | Sizing Precision | Notes |
|---|---|---|
| Everyday / casual | S/M/L/XL range | Wide ranges work fine |
| Athletic / running | S/M/L/XL range | Some brands use shoe size ranges (e.g. 8–9.5) |
| Compression socks | Exact shoe size + calf circumference | Check the brand's specific chart |
| Wool / hiking socks | S/M/L range | Some shrinkage possible — size up in cotton |
Frequently Asked Questions
What sock size is shoe size 10?
Men's shoe size 10 = Large (L) sock. Women's shoe size 10 = Large (L) sock. Both cover the size-10 range in their respective charts.
Do socks shrink after washing?
Cotton socks can shrink up to half a size after washing in warm water. Wool and synthetic socks are more stable. If between sizes, choose the larger sock for cotton.
Are men's and women's sock sizes different?
Yes. The ranges overlap but differ. A men's Medium covers sizes 6.5–9. A women's Medium covers approximately the same shoe sizes but for a smaller foot, since women's shoes run smaller at the same number.
Should compression socks fit differently?
Yes — compression socks must fit more precisely than regular socks because compression level depends on correct sizing. Always use the specific brand's chart for compression socks, not this general guide.
What happens if I wear socks that are too small?
Socks that are too small bunch at the toes and heel, causing blisters and restricting circulation. Always size up if between sock sizes rather than down.