Aerie (OFFLINE) to lululemon leggings size
The short answer
Aerie (OFFLINE) XXS is lululemon 2 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.
On 1 sizes the charts land two or more sizes from the same label. Brands do not measure the body the same way, so on those rows treat the chart answer and the same label as the two ends of a range.
| Aerie (OFFLINE) | Aerie (OFFLINE) builds it for | lululemon, by chart | Same label | lululemon builds it for | lululemon also prints |
|---|---|---|---|---|---|
| XXS | waist 22.5 to 23.5 in, hip 32 to 33 in | 2 | not published | waist 23 in, hip 33 in | Letter XXS |
| XS | waist 24.5 to 25.5 in, hip 34 to 35 in | 4 | not published | waist 25 in, hip 35 in | Letter XS |
| S | waist 26.5 to 27.5 in, hip 36 to 37 in | 6 | not published | waist 27 in, hip 37 in | Letter S |
| M | waist 28.5 to 29.5 in, hip 38 to 39 in | 8 | not published | waist 29 in, hip 39 in | Letter M |
| L | waist 31 to 32.5 in, hip 40.5 to 42 in | 10 or 12 | not published | waist 31 in, hip 41 in | Letter L |
| XL | waist 34 to 36 in, hip 43.5 to 45.5 in | 14 | not published | waist 35 in, hip 45 in | Letter XXL |
| XXL | waist 38 in, hip 47.5 in | 16 | 20 | waist 38 in, hip 47 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
- Aerie (OFFLINE) size guide, read on 2026-09-18. Aerie (OFFLINE) on TrueToSize
- lululemon size guide, read on 2026-09-17. lululemon on TrueToSize