Gymshark to Sweaty Betty leggings size
The short answer
Gymshark M is Sweaty Betty M or L by the two brands' own charts. 0 of 7 Gymshark sizes land on a different label at Sweaty Betty.
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 | Sweaty Betty, by chart | Same label | Sweaty Betty builds it for | Sweaty Betty also prints |
|---|---|---|---|---|---|
| XXS | waist 24 in, hip 35.5 in | XXS or XS | XXS | waist 23 in, hip 34 in | US numeric 2 |
| XS | waist 26 in, hip 37.5 in | XS or S | XS | waist 25 in, hip 36 in | US numeric 4 |
| S | waist 28 in, hip 39.5 in | S or M | S | waist 27 in, hip 38 in | US numeric 6 |
| M | waist 30 in, hip 41.5 in | M or L | M | waist 29 in, hip 40 in | US numeric 8 |
| L | waist 32 in, hip 43.5 in | L or XL | L | waist 31 in, hip 42 in | US numeric 10 |
| XL | waist 34 in, hip 45.5 in | XL | XL | waist 33 in, hip 44 in | US numeric 12 |
| XXL | waist 36 in, hip 47.7 in | XXL | XXL | waist 36 in, hip 46.5 in | US numeric 14 |
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
- Sweaty Betty size guide, read on 2026-09-17. Sweaty Betty on TrueToSize