SET Active to Zella leggings size

The short answer

SET Active XS is Zella XXS by the two brands' own charts. 2 of 6 SET Active sizes land on a different label at Zella.

Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.

Every SET Active size read across to Zella. Letter sizes on the left, Letter on the right.
SET Active	SET Active builds it for	Zella, by chart	Same label	Zella builds it for	Zella also prints
XS	waist 22 to 24 in	XXS	XS	waist 24 in, hip 33.5 in	US numeric 00
S	waist 25 to 27 in	XS	S	waist 25 to 26 in, hip 34.5 to 35.5 in	US numeric 0-2
M	waist 28 to 30 in	M	M	waist 29 to 30 in, hip 38.5 to 39.5 in	US numeric 8-10
L	waist 31 to 33 in	L	L	waist 31.5 to 33.5 in, hip 41.5 to 43.5 in	US numeric 12-14
XL	waist 34 to 36 in	XL	XL	waist 35.5 in, hip 45.5 in	US numeric 16
XXL	waist 37 to 40 in	XXL	XXL	waist 38 in, hip 48.5 in	US numeric 18

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

SET Active size guide, read on 2026-09-18.
Zella size guide, read on 2026-09-18. Zella on TrueToSize

Zella to SET Active