POPFLEX to Gymshark leggings size
The short answer
POPFLEX XS is Gymshark XXS or XS by the two brands' own charts. 3 of 6 POPFLEX sizes land on a different label at Gymshark.
Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.
| POPFLEX | POPFLEX builds it for | Gymshark, by chart | Same label | Gymshark builds it for | Gymshark also prints |
|---|---|---|---|---|---|
| XXS | waist 22 to 24 in, hip 32 to 34 in | XXS | XXS | waist 24 in, hip 35.5 in | US numeric 2-4 |
| XS | waist 24 to 26 in, hip 34 to 36 in | XXS or XS | XS | waist 24 in, hip 35.5 in | US numeric 2-4 |
| S | waist 26 to 28 in, hip 36 to 38 in | XS or S | S | waist 26 in, hip 37.5 in | US numeric 4-6 |
| M | waist 28 to 31 in, hip 38 to 40 in | M | M | waist 30 in, hip 41.5 in | US numeric 8-10 |
| L | waist 31 to 34 in, hip 40 to 43 in | L | L | waist 32 in, hip 43.5 in | US numeric 10-12 |
| XL | waist 34 to 38 in, hip 43 to 47 in | XXL | XL | waist 36 in, hip 47.7 in | US numeric 14-16 |
| 1X | waist 38 to 42 in, hip 48 to 52 in | not made | not published | not published | not published |
| 2X | waist 42 to 46 in, hip 52 to 56 in | not made | not published | not published | not published |
| 3X | waist 46 to 50 in, hip 56 to 60 in | not made | not published | not published | 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
- POPFLEX size guide, read on 2026-09-18.
- Gymshark size guide, read on 2026-09-17. Gymshark on TrueToSize