Gymshark to Oysho leggings size
The short answer
Gymshark S is Oysho M by the two brands' own charts. 2 of 7 Gymshark sizes land on a different label at Oysho.
Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.
| Gymshark | Gymshark builds it for | Oysho, by chart | Same label | Oysho builds it for | Oysho also prints |
|---|---|---|---|---|---|
| XXS | waist 24 in, hip 35.5 in | XXS | XXS | waist 24 to 25 in, hip 36 to 37 in | not published |
| XS | waist 26 in, hip 37.5 in | XS | XS | waist 25 to 26 in, hip 37 to 38 in | not published |
| S | waist 28 in, hip 39.5 in | M | S | waist 27 to 29 in, hip 39 to 41 in | not published |
| M | waist 30 in, hip 41.5 in | L | M | waist 30 to 33 in, hip 42 to 45 in | not published |
| L | waist 32 in, hip 43.5 in | L | L | waist 30 to 33 in, hip 42 to 45 in | not published |
| XL | waist 34 in, hip 45.5 in | XL | XL | waist 33 to 35 in, hip 45 to 47 in | not published |
| XXL | waist 36 in, hip 47.7 in | XXL | XXL | waist 36 to 39 in, hip 48 to 51 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
- Gymshark size guide, read on 2026-09-17. Gymshark on TrueToSize
- Oysho size guide, read on 2026-09-18. Oysho on TrueToSize