Smartwool to adidas leggings size
The short answer
Smartwool S is adidas M by the two brands' own charts. 5 of 5 Smartwool sizes land on a different label at adidas.
Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.
On 1 sizes the charts land two or more sizes from the same label. Brands do not measure the body the same way, so on those rows treat the chart answer and the same label as the two ends of a range.
| Smartwool | Smartwool builds it for | adidas, by chart | Same label | adidas builds it for | adidas also prints |
|---|---|---|---|---|---|
| S | waist 29 to 31 in, hip 36 to 38 in | M | S | waist 29 to 31 in, hip 38.5 to 40.5 in, inseam 31.5 in | US numeric 8-10 |
| M | waist 32 to 34 in, hip 39 to 41 in | L | M | waist 31.5 to 33.5 in, hip 41 to 43 in, inseam 31.5 in | US numeric 12-14 |
| L | waist 35 to 37 in, hip 42 to 44 in | XL | L | waist 34 to 37 in, hip 43.5 to 46 in, inseam 31.5 in | US numeric 16-18 |
| XL | waist 38 to 40 in, hip 45 to 48 in | 2XL | XL | waist 37.5 to 41 in, hip 46.5 to 49 in, inseam 32 in | US numeric 20 |
| XXL | waist 41 to 44 in, hip 49 to 51 in | 2X | 2XL | waist 39 to 42.5 in, hip 47.5 to 51 in, inseam 31 in | US numeric 18W-20W |
What wearers say
Charts describe a garment. People who own both brands describe a fit, and their answer ranks above this table once five of them stand behind it. Pick your size in the converter to see whether there are enough yet.
Sources
- Smartwool size guide, read on 2026-09-18.
- adidas size guide, read on 2026-09-18. adidas on TrueToSize