Gymshark to Goldwin size
The short answer
Gymshark M is Goldwin 5 by the two brands' own charts.
Both brands publish the body chest each size is cut for, so every row matches a chest, not a letter.
| Gymshark | Gymshark builds it for | Goldwin Japan sizing, by chart | Same label | Goldwin builds it for | Goldwin also prints |
|---|---|---|---|---|---|
| XS | chest 37 in, waist 29.5 in | 2 | not published | chest 34.7 to 37.8 in, waist 29.1 to 32.3 in, hip 35.4 to 38.6 in | not published |
| S | chest 39 in, waist 31.5 in | 4 | not published | chest 37.8 to 40.9 in, waist 32.3 to 35.4 in, hip 38.6 to 41.7 in | not published |
| M | chest 41 in, waist 33.5 in | 5 | not published | chest 39.4 to 42.5 in, waist 33.9 to 37 in, hip 40.2 to 43.3 in | not published |
| L | chest 43 in, waist 35.5 in | 6 | not published | chest 40.9 to 44.1 in, waist 35.4 to 38.6 in, hip 41.7 to 44.9 in | not published |
| XL | chest 45 in, waist 37.5 in | not made | not published | not published | not published |
| XXL | chest 47 in, waist 39.5 in | not made | not published | not published | not published |
| XXXL | chest 49 in, waist 41.5 in | not made | not published | not published | 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
- Goldwin Japan sizing size guide, read on 2026-09-25.