Decathlon to Marks & Spencer (Goodmove) leggings size
The short answer
Decathlon M is Marks & Spencer (Goodmove) 12 by the two brands' own charts.
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 | Marks & Spencer (Goodmove), by chart | Same label | Marks & Spencer (Goodmove) builds it for | Marks & Spencer (Goodmove) also prints |
|---|---|---|---|---|---|
| 2XS | waist 23.6 to 24.8 in, hip 31.1 to 33.5 in | 6 | not published | waist 24 in, hip 33.8 in | US numeric 2 · AU 6 |
| XS | waist 25.2 to 26.8 in, hip 33.5 to 35.4 in | 8 | not published | waist 25.5 in, hip 35.5 in | US numeric 4 · AU 8 |
| S | waist 27.2 to 28.7 in, hip 35.4 to 37.8 in | 10 | not published | waist 27.5 in, hip 37.5 in | US numeric 6 · AU 10 |
| M | waist 29.1 to 31.1 in, hip 37.8 to 40.2 in | 12 | not published | waist 29.5 in, hip 39.5 in | US numeric 8 · AU 12 |
| L | waist 31.5 to 33.9 in, hip 40.2 to 42.5 in | 14 or 16 | not published | waist 31.8 in, hip 41.5 in | US numeric 10 · AU 14 |
| XL | waist 34.3 to 36.6 in, hip 42.5 to 44.9 in | 18 or 16 | not published | waist 36.3 in, hip 45.3 in | US numeric 14 · AU 18 |
| 2XL | waist 37 to 39.4 in, hip 44.9 to 47.2 in | 20 | not published | waist 38.5 in, hip 47.5 in | US numeric 16 · AU 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.
- Marks & Spencer (Goodmove) size guide, read on 2026-09-18.