Smartwool Sizings
MEN'S SMARTWOOL SOCK SIZE CHART
| Size | U.S. Men's Shoe Size | Euro Shoe Size | UK Shoe Size | Calf Circumference (Largest part of the calf) |
| S | 3-5.5 | 34-37 | 2-4.5 | 11"-14.5" (18-26.5 cm) |
| M | 6-8.5 | 38-41 | 5-7.5 | 12.5"-16.5" (32-41 cm) |
| L | 9-11.5 | 42-45 | 8-10.5 | 14.5"-18" (37-45.5 cm) |
| XL | 12-14.5 | 46-49 | 11-13.5 | 16"-23" (41-58 cm) |
WOMEN'S SMARTWOOL SOCK SIZE CHART
| Size | U.S. Women's Shoe Size | Euro Shoe Size | UK Shoe Size | Calf Circumference (Largest part of the calf) |
| S | 4-6.5 | 34-37 | 2-4.5 | 11"-14.5" (18-26.5 cm) |
| M | 7-9.5 | 38-41 | 5-7.5 | 12.5"-16.5" (32-41 cm) |
| L | 10-12.5 | 42-45 | 8-10.5 | 14.5"-18" (37-45.5 cm) |
| XL | N/A | 46-49 | 11-13.5 | 16"-23" (41-58 cm) |
KID'S SMARTWOOL SOCK SIZE CHART
| Size | U.S. Shoe Size | Euro Shoe Size | UK Shoe Size |
| XS | 6-8.5 | 22-25 | 5-7.5 |
| S | 9-11.5 | 26-28 | 8-10.5 |
| M | 12-2.5 | 29-32 | 11-13.5 |
| L | 3-6 | 33-36 | 1-4.5 |
Do Smartwool socks run big, small, or true to size?
Smartwool socks run true to size, based on your total foot length (and calf circumference, for compression socks). Refer to the sock size charts above to identify which size is right for you.
How do I know what size is right for me?
With proper foot length (and calf circumference, when applicable), you can reference the above Smartwool socks size chart to ensure the right size. If you have specific questions about size and fit, feel free to contact us.
Will Smartwool socks shrink or stretch?
Not with proper care. Smartwool’s high-quality wool sock construction methods help your socks retain their shape and fit.