SKIMS to Old Navy leggings size
The short answer
SKIMS 2X is Old Navy XL or XXL by the two brands' own charts. 3 of 9 SKIMS 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.
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.
| SKIMS | SKIMS builds it for | Old Navy, by chart | Same label | Old Navy builds it for | Old Navy also prints |
|---|---|---|---|---|---|
| XXS | waist 23 to 24 in, hip 31 to 34 in | XXS | XXS | waist 24 in, hip 34.5 in | US numeric 00 |
| XS | waist 24 to 26 in, hip 34 to 36.5 in | XS | XS | waist 25 to 26 in, hip 35.5 to 36.5 in | US numeric 0-2 |
| S | waist 26.5 to 28.5 in, hip 37 to 39 in | S | S | waist 27 to 28 in, hip 37.5 to 38.5 in | US numeric 4-6 |
| M | waist 29 to 31 in, hip 39.5 to 41.5 in | M | M | waist 29 to 30 in, hip 39.5 to 40.5 in | US numeric 8-10 |
| L | waist 31.5 to 34.5 in, hip 42 to 44 in | L | L | waist 31.5 to 33.5 in, hip 42 to 44 in | US numeric 12-14 |
| XL | waist 35 to 38 in, hip 44.5 to 47.5 in | XL | XL | waist 36.3 to 39 in, hip 46.5 to 49 in | US numeric 16-18 |
| 2X | waist 38.5 to 41.5 in, hip 48 to 51 in | XL or XXL | 2X | waist 36.3 to 39 in, hip 46.5 to 49 in | US numeric 16-18 |
| 3X | waist 42 to 45.5 in, hip 51.5 to 55 in | 2X | 3X | waist 42 to 44.3 in, hip 51.5 to 53.8 in | US numeric 20-22 |
| 4X | waist 46 to 49.5 in, hip 55.5 to 59 in | 3X | 4X | 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
- SKIMS size guide, read on 2026-09-18. SKIMS on TrueToSize
- Old Navy size guide, read on 2026-09-17. Old Navy on TrueToSize