SET Active to Onzie leggings size

The short answer

SET Active XS is Onzie X/S by the two brands' own charts. 5 of 6 SET Active sizes land on a different label at Onzie.

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 Onzie. Letter sizes on the left, Letter on the right.
SET Active	SET Active builds it for	Onzie, by chart	Same label	Onzie builds it for	Onzie also prints
XS	waist 22 to 24 in	X/S	not published	waist 24 to 26 in, hip 33 to 35 in	US numeric 0-2
S	waist 25 to 27 in	X/S	X/S	waist 24 to 26 in, hip 33 to 35 in	US numeric 0-2
M	waist 28 to 30 in	M/L	S/M	waist 28 to 31 in, hip 38 to 40 in	US numeric 6-8
L	waist 31 to 33 in	L/L	M/L	waist 31 to 33 in, hip 40 to 42 in	US numeric 10-12
XL	waist 34 to 36 in	XL	XL	waist 34 to 37 in, hip 43 to 45 in	US numeric 14-16
XXL	waist 37 to 40 in	1X	not published	waist 38 to 40 in, hip 46 to 48 in	US numeric 16-18

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.

Open in the converter Add an item you own

Sources

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

Onzie to SET Active