POPFLEX to Old Navy leggings size
The short answer
POPFLEX 1X is Old Navy XL or XXL by the two brands' own charts. 1 of 9 POPFLEX sizes land on a different label at Old Navy.
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 | Old Navy, by chart | Same label | Old Navy builds it for | Old Navy also prints |
|---|---|---|---|---|---|
| XXS | waist 22 to 24 in, hip 32 to 34 in | XXS | XXS | waist 24 in, hip 34.5 in | US numeric 00 |
| XS | waist 24 to 26 in, hip 34 to 36 in | XS | XS | waist 25 to 26 in, hip 35.5 to 36.5 in | US numeric 0-2 |
| S | waist 26 to 28 in, hip 36 to 38 in | S | S | waist 27 to 28 in, hip 37.5 to 38.5 in | US numeric 4-6 |
| M | waist 28 to 31 in, hip 38 to 40 in | M | M | waist 29 to 30 in, hip 39.5 to 40.5 in | US numeric 8-10 |
| L | waist 31 to 34 in, hip 40 to 43 in | L | L | waist 31.5 to 33.5 in, hip 42 to 44 in | US numeric 12-14 |
| XL | waist 34 to 38 in, hip 43 to 47 in | XL | XL | waist 36.3 to 39 in, hip 46.5 to 49 in | US numeric 16-18 |
| 1X | waist 38 to 42 in, hip 48 to 52 in | XL or XXL | not published | waist 36.3 to 39 in, hip 46.5 to 49 in | US numeric 16-18 |
| 2X | waist 42 to 46 in, hip 52 to 56 in | 2X | 2X | waist 42 to 44.3 in, hip 51.5 to 53.8 in | US numeric 20-22 |
| 3X | waist 46 to 50 in, hip 56 to 60 in | 3X | 3X | waist 46.6 to 49 in, hip 56.1 to 58.5 in | US numeric 24-26 |
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.
- Old Navy size guide, read on 2026-09-17. Old Navy on TrueToSize