Decathlon to Aerie (OFFLINE) leggings size
The short answer
Decathlon 2XS is Aerie (OFFLINE) XS or XXS by the two brands' own charts. 2 of 7 Decathlon sizes land on a different label at Aerie (OFFLINE).
Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.
| Decathlon | Decathlon builds it for | Aerie (OFFLINE), by chart | Same label | Aerie (OFFLINE) builds it for | Aerie (OFFLINE) also prints |
|---|---|---|---|---|---|
| 2XS | waist 23.6 to 24.8 in, hip 31.1 to 33.5 in | XS or XXS | XXS | waist 24.5 to 25.5 in, hip 34 to 35 in | US numeric 0-2 |
| XS | waist 25.2 to 26.8 in, hip 33.5 to 35.4 in | XS or S | XS | waist 24.5 to 25.5 in, hip 34 to 35 in | US numeric 0-2 |
| S | waist 27.2 to 28.7 in, hip 35.4 to 37.8 in | S or M | S | waist 26.5 to 27.5 in, hip 36 to 37 in | US numeric 4-6 |
| M | waist 29.1 to 31.1 in, hip 37.8 to 40.2 in | M or L | M | waist 28.5 to 29.5 in, hip 38 to 39 in | US numeric 8-10 |
| L | waist 31.5 to 33.9 in, hip 40.2 to 42.5 in | L | L | waist 31 to 32.5 in, hip 40.5 to 42 in | US numeric 12-14 |
| XL | waist 34.3 to 36.6 in, hip 42.5 to 44.9 in | XL | XL | waist 34 to 36 in, hip 43.5 to 45.5 in | US numeric 16-18 |
| 2XL | waist 37 to 39.4 in, hip 44.9 to 47.2 in | XXL | XXL | waist 38 in, hip 47.5 in | US numeric 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
- Decathlon size guide, read on 2026-09-18.
- Aerie (OFFLINE) size guide, read on 2026-09-18. Aerie (OFFLINE) on TrueToSize