Sweaty Betty to Lorna Jane leggings size
The short answer
Sweaty Betty XS is Lorna Jane XXS by the two brands' own charts. 6 of 6 Sweaty Betty sizes land on a different label at Lorna Jane.
Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.
| Sweaty Betty | Sweaty Betty builds it for | Lorna Jane, by chart | Same label | Lorna Jane builds it for | Lorna Jane also prints |
|---|---|---|---|---|---|
| XXS | waist 23 in, hip 34 in | not made | XXS | not published | not published |
| XS | waist 25 in, hip 36 in | XXS | XS | waist 25.6 in, hip 31.5 in | US numeric 2 |
| S | waist 27 in, hip 38 in | XS | S | waist 27.6 in, hip 35.4 in | US numeric 4 |
| M | waist 29 in, hip 40 in | S | M | waist 29.5 in, hip 39.4 in | US numeric 6 |
| L | waist 31 in, hip 42 in | M | L | waist 31.5 in, hip 43.3 in | US numeric 8 |
| XL | waist 33 in, hip 44 in | L | XL | waist 33.5 in, hip 47.2 in | US numeric 10 |
| XXL | waist 36 in, hip 46.5 in | XL | XXL | waist 35.4 in, hip 51.2 in | US numeric 12 |
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
- Sweaty Betty size guide, read on 2026-09-17. Sweaty Betty on TrueToSize
- Lorna Jane size guide, read on 2026-09-18.