Onzie to Decathlon leggings size
The short answer
Onzie X/S is Decathlon 2XS by the two brands' own charts. 5 of 6 Onzie sizes land on a different label at Decathlon.
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 | Decathlon, by chart | Same label | Decathlon builds it for | Decathlon also prints |
|---|---|---|---|---|---|
| X/S | waist 24 to 26 in, hip 33 to 35 in | 2XS | not published | waist 23.6 to 24.8 in, hip 31.1 to 33.5 in | not published |
| S/M | waist 26 to 28 in, hip 36 to 38 in | S | not published | waist 27.2 to 28.7 in, hip 35.4 to 37.8 in | not published |
| M/L | waist 28 to 31 in, hip 38 to 40 in | M | not published | waist 29.1 to 31.1 in, hip 37.8 to 40.2 in | not published |
| L/L | waist 31 to 33 in, hip 40 to 42 in | L | not published | waist 31.5 to 33.9 in, hip 40.2 to 42.5 in | not published |
| XL | waist 34 to 37 in, hip 43 to 45 in | XL | XL | waist 34.3 to 36.6 in, hip 42.5 to 44.9 in | not published |
| 1X | waist 38 to 40 in, hip 46 to 48 in | 2XL | not published | waist 37 to 39.4 in, hip 44.9 to 47.2 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
- Onzie size guide, read on 2026-09-18.
- Decathlon size guide, read on 2026-09-18.