Onzie to SKIMS leggings size
The short answer
Onzie X/S is SKIMS XS by the two brands' own charts. 5 of 6 Onzie sizes land on a different label at SKIMS.
Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.
| Onzie | Onzie builds it for | SKIMS, by chart | Same label | SKIMS builds it for | SKIMS also prints |
|---|---|---|---|---|---|
| X/S | waist 24 to 26 in, hip 33 to 35 in | XS | not published | waist 24 to 26 in, hip 34 to 36.5 in | US numeric 0-2 |
| S/M | waist 26 to 28 in, hip 36 to 38 in | S | not published | waist 26.5 to 28.5 in, hip 37 to 39 in | US numeric 4-6 |
| M/L | waist 28 to 31 in, hip 38 to 40 in | M | not published | waist 29 to 31 in, hip 39.5 to 41.5 in | US numeric 8-10 |
| L/L | waist 31 to 33 in, hip 40 to 42 in | L | not published | waist 31.5 to 34.5 in, hip 42 to 44 in | US numeric 12-14 |
| XL | waist 34 to 37 in, hip 43 to 45 in | XL | XL | waist 35 to 38 in, hip 44.5 to 47.5 in | US numeric 16 |
| 1X | waist 38 to 40 in, hip 46 to 48 in | 2X | not published | waist 38.5 to 41.5 in, hip 48 to 51 in | US numeric 18-20 |
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
- Onzie size guide, read on 2026-09-18.
- SKIMS size guide, read on 2026-09-18. SKIMS on TrueToSize