TrueToSize

Convert / Leggings

Lululemon to Under Armour leggings size

The short answer

lululemon 4 is Under Armour XXS 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 Under Armour. US numeric sizes on the left, Letter on the right.
lululemonlululemon builds it forUnder Armour, by chartSame labelUnder Armour builds it forUnder Armour also prints
0waist 21 in, hip 32 innot madenot publishednot publishednot published
2waist 23 in, hip 33 innot madeXXSnot publishednot published
4waist 25 in, hip 35 inXXSXSwaist 24.5 to 25.5 in, hip 33 to 34.5 inUS numeric 00
6waist 27 in, hip 37 inXSnot publishedwaist 25.5 to 27 in, hip 34.5 to 36 inUS numeric 0-2
8waist 29 in, hip 39 inSMnot publishedwaist 27 to 29 in, hip 36 to 38 inUS numeric 4-6
10waist 31 in, hip 41 inMDnot publishedwaist 29 to 31 in, hip 38 to 40 inUS numeric 8-10
12waist 33 in, hip 43 inLGXLwaist 31 to 34 in, hip 40 to 43 inUS numeric 12-14
14waist 35 in, hip 45 inXLXXLwaist 34 to 37 in, hip 43 to 46 inUS numeric 16
16waist 38 in, hip 47 inXXLnot publishedwaist 37 to 40 in, hip 46 to 49 inUS numeric 18
18waist 41 in, hip 49 in1Xnot publishedwaist 39 to 43.5 in, hip 47 to 50.5 inUS numeric 16W-18W
20waist 43 in, hip 51 in3XLnot publishedwaist 40 to 43 in, hip 49 to 52 inUS numeric 20
Tinted rows change label or sit between two sizes. 2 sizes have no counterpart on the Under Armour chart. 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.

Open in the converterAdd an item you own

Sources

Under Armour to lululemon