Sock Size Calculator
Turn your shoe size into the right sock size band, with the S/M/L equivalent.
Find your sock size
How sock sizing works
Sock sizes are bands
A sock labelled 9–11 or 10–13 refers to the US shoe-size range it fits.
Pick your shoe size
Choose the wearer and enter the US shoe size to see the matching band.
Between bands?
If your shoe size sits on a boundary, the larger band usually wears more comfortably.
Compression socks
Compression socks size differently — by ankle/calf measurement — so check the brand's chart.
Sized by calf measurement — check the chart.
View on Amazon →Frequently asked questions
What sock size is a US 9 shoe?
A men's US 9 is a 10–13 sock (Large); a women's US 9 is a 9–11 sock.
What does sock size 10-13 mean?
It's the US shoe-size range the sock fits — roughly a men's 9 to 12.5.
How this is calculated
Sock size bands map to US shoe size: a 9–11 sock fits roughly a men's US 3–8.5 or women's 4–10, while a 10–13 sock fits a men's 9–12.5. We convert the shoe size you enter to the matching band and S/M/L letter.
Sources: Standard US sock-size bands by shoe size, cross-checked retailer charts 2026.