Decathlon to Alphalete leggings size
The short answer
Decathlon L is Alphalete XL or L by the two brands' own charts. 2 of 7 Decathlon sizes land on a different label at Alphalete.
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 | Alphalete, by chart | Same label | Alphalete builds it for | Alphalete also prints |
|---|---|---|---|---|---|
| 2XS | waist 23.6 to 24.8 in, hip 31.1 to 33.5 in | 2XS | 2XS | waist 23 to 24 in, hip 33 to 34 in | not published |
| XS | waist 25.2 to 26.8 in, hip 33.5 to 35.4 in | XS | XS | waist 25 to 26 in, hip 35 to 36 in | not published |
| S | waist 27.2 to 28.7 in, hip 35.4 to 37.8 in | S | S | waist 27 to 28 in, hip 37 to 38 in | not published |
| M | waist 29.1 to 31.1 in, hip 37.8 to 40.2 in | M | M | waist 29 to 30 in, hip 39 to 40 in | not published |
| L | waist 31.5 to 33.9 in, hip 40.2 to 42.5 in | XL or L | L | waist 33 to 34 in, hip 43 to 44 in | not published |
| XL | waist 34.3 to 36.6 in, hip 42.5 to 44.9 in | 2XL | XL | waist 35 to 36 in, hip 45 to 46 in | not published |
| 2XL | waist 37 to 39.4 in, hip 44.9 to 47.2 in | 2XL | 2XL | waist 35 to 36 in, hip 45 to 46 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
- Decathlon size guide, read on 2026-09-18.
- Alphalete size guide, read on 2026-09-18. Alphalete on TrueToSize