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Lululemon to Nike leggings size

The short answer

lululemon 10 is Nike M 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.

Every lululemon size read across to Nike. US numeric sizes on the left, Letter on the right.
lululemonlululemon builds it forNike, by chartSame labelNike builds it forNike also prints
0waist 21 in, hip 32 inXXSnot publishedwaist 21.3 to 23.5 in, hip 30.5 to 33 inUS numeric 0
2waist 23 in, hip 33 inXXSXXSwaist 21.3 to 23.5 in, hip 30.5 to 33 inUS numeric 0
4waist 25 in, hip 35 inXSXSwaist 23.5 to 26 in, hip 33 to 35.5 inUS numeric 0-2
6waist 27 in, hip 37 inSSwaist 26 to 29 in, hip 35.5 to 38.5 inUS numeric 4-6
8waist 29 in, hip 39 inMMwaist 29 to 31.5 in, hip 38.5 to 41 inUS numeric 8-10
10waist 31 in, hip 41 inMLwaist 29 to 31.5 in, hip 38.5 to 41 inUS numeric 8-10
12waist 33 in, hip 43 inLXLwaist 31.5 to 34.5 in, hip 41 to 44 inUS numeric 12-14
14waist 35 in, hip 45 inXLXXLwaist 34.5 to 38.5 in, hip 44 to 47 inUS numeric 16-18
16waist 38 in, hip 47 inXLnot publishedwaist 34.5 to 38.5 in, hip 44 to 47 inUS numeric 16-18
18waist 41 in, hip 49 inXXLnot publishedwaist 38.5 to 42.5 in, hip 47 to 50 inUS numeric 20-22
20waist 43 in, hip 51 in1Xnot publishedwaist 43 to 45.5 in, hip 51 to 54 inUS numeric 18W-20W
Tinted rows change label or sit between two sizes. Read from the two charts only; no formula and no averaging.

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.

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Sources

Nike to lululemon