Lululemon to Spanx leggings size
The short answer
lululemon 6 is Spanx XS 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.
| lululemon | lululemon builds it for | Spanx, by chart | Same label | Spanx builds it for | Spanx also prints |
|---|---|---|---|---|---|
| 0 | waist 21 in, hip 32 in | not made | not published | not published | not published |
| 2 | waist 23 in, hip 33 in | not made | not published | not published | not published |
| 4 | waist 25 in, hip 35 in | XS | XS | waist 25 to 27 in, hip 34 to 36 in | US numeric 0-2 |
| 6 | waist 27 in, hip 37 in | XS | S | waist 25 to 27 in, hip 34 to 36 in | US numeric 0-2 |
| 8 | waist 29 in, hip 39 in | S | M | waist 27 to 29 in, hip 36 to 38 in | US numeric 4-6 |
| 10 | waist 31 in, hip 41 in | M | L | waist 29 to 31 in, hip 38 to 40 in | US numeric 8-10 |
| 12 | waist 33 in, hip 43 in | L | XL | waist 31 to 33.5 in, hip 40 to 42.5 in | US numeric 12-14 |
| 14 | waist 35 in, hip 45 in | XL | not published | waist 33.5 to 36 in, hip 42.5 to 45 in | US numeric 16 |
| 16 | waist 38 in, hip 47 in | 1X | not published | waist 36 to 39 in, hip 45 to 48 in | US numeric 18-20 |
| 18 | waist 41 in, hip 49 in | 2X | not published | waist 39 to 42 in, hip 48 to 51 in | US numeric 22-24 |
| 20 | waist 43 in, hip 51 in | 3X | not published | waist 42 to 45 in, hip 51 to 54 in | US numeric 26 |
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
- lululemon size guide, read on 2026-09-17. lululemon on TrueToSize
- Spanx size guide, read on 2026-09-18. Spanx on TrueToSize