Smartwool to POPFLEX leggings size
The short answer
Smartwool S is POPFLEX M by the two brands' own charts. 5 of 5 Smartwool sizes land on a different label at POPFLEX.
Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.
| Smartwool | Smartwool builds it for | POPFLEX, by chart | Same label | POPFLEX builds it for | POPFLEX also prints |
|---|---|---|---|---|---|
| S | waist 29 to 31 in, hip 36 to 38 in | M | S | waist 28 to 31 in, hip 38 to 40 in | not published |
| M | waist 32 to 34 in, hip 39 to 41 in | L | M | waist 31 to 34 in, hip 40 to 43 in | not published |
| L | waist 35 to 37 in, hip 42 to 44 in | XL | L | waist 34 to 38 in, hip 43 to 47 in | not published |
| XL | waist 38 to 40 in, hip 45 to 48 in | 1X | XL | waist 38 to 42 in, hip 48 to 52 in | not published |
| XXL | waist 41 to 44 in, hip 49 to 51 in | 2X | not published | waist 42 to 46 in, hip 52 to 56 in | not published |
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.
- POPFLEX size guide, read on 2026-09-18.