Gymshark to adidas size
The short answer
Gymshark XS is adidas M by the two brands' own charts. 6 of 7 Gymshark sizes land on a different label at adidas.
Both brands publish the body chest each size is cut for, so every row matches a chest, not a letter.
On 1 sizes the charts land two or more sizes from the same label. Brands do not measure the body the same way, so on those rows treat the chart answer and the same label as the two ends of a range.
| Gymshark | Gymshark builds it for | adidas, by chart | Same label | adidas builds it for | adidas also prints |
|---|---|---|---|---|---|
| XS | chest 37 in, waist 29.5 in | M | XS | chest 36.5 to 39 in, waist 32 to 34.5 in, hip 36.5 to 39 in | not published |
| S | chest 39 in, waist 31.5 in | M | S | chest 36.5 to 39 in, waist 32 to 34.5 in, hip 36.5 to 39 in | not published |
| M | chest 41 in, waist 33.5 in | L | M | chest 39.5 to 42.5 in, waist 35 to 38 in, hip 39.5 to 42 in | not published |
| L | chest 43 in, waist 35.5 in | XL | L | chest 43 to 46.5 in, waist 38.5 to 42 in, hip 42.5 to 45.5 in | not published |
| XL | chest 45 in, waist 37.5 in | XL | XL | chest 43 to 46.5 in, waist 38.5 to 42 in, hip 42.5 to 45.5 in | not published |
| XXL | chest 47 in, waist 39.5 in | 2XL | 2XL | chest 47 to 51 in, waist 42.5 to 47 in, hip 46 to 49 in | not published |
| XXXL | chest 49 in, waist 41.5 in | 2XL | 3XL | chest 47 to 51 in, waist 42.5 to 47 in, hip 46 to 49 in | not published |
What wearers say
Charts describe a garment, not a fit. We do not collect fit reports for this category yet, so this table is the two brands' own claims and nothing more.
Sources
- Gymshark size guide, read on 2026-09-18. Gymshark on TrueToSize
- adidas size guide, read on 2026-09-18. adidas on TrueToSize