Sweaty Betty to lululemon leggings size
The short answer
Sweaty Betty M is lululemon 8 by the two brands' own charts.
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 | lululemon, by chart | Same label | lululemon builds it for | lululemon also prints |
|---|---|---|---|---|---|
| XXS | waist 23 in, hip 34 in | 2 | 2 | waist 23 in, hip 33 in | Letter XXS |
| XS | waist 25 in, hip 36 in | 4 | 4 | waist 25 in, hip 35 in | Letter XS |
| S | waist 27 in, hip 38 in | 6 | 6 | waist 27 in, hip 37 in | Letter S |
| M | waist 29 in, hip 40 in | 8 | 8 | waist 29 in, hip 39 in | Letter M |
| L | waist 31 in, hip 42 in | 10 | 10 | waist 31 in, hip 41 in | Letter L |
| XL | waist 33 in, hip 44 in | 12 | 12 | waist 33 in, hip 43 in | Letter XL |
| XXL | waist 36 in, hip 46.5 in | 14 | 14 | waist 35 in, hip 45 in | Letter XXL |
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
- lululemon size guide, read on 2026-09-17. lululemon on TrueToSize