SET Active to POPFLEX leggings size

The short answer

SET Active XS is POPFLEX XXS by the two brands' own charts. 3 of 6 SET Active sizes land on a different label at POPFLEX.

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 POPFLEX. Letter sizes on the left, Letter on the right.
SET Active	SET Active builds it for	POPFLEX, by chart	Same label	POPFLEX builds it for	POPFLEX also prints
XS	waist 22 to 24 in	XXS	XS	waist 22 to 24 in, hip 32 to 34 in	not published
S	waist 25 to 27 in	XS	S	waist 24 to 26 in, hip 34 to 36 in	not published
M	waist 28 to 30 in	M	M	waist 28 to 31 in, hip 38 to 40 in	not published
L	waist 31 to 33 in	L	L	waist 31 to 34 in, hip 40 to 43 in	not published
XL	waist 34 to 36 in	XL	XL	waist 34 to 38 in, hip 43 to 47 in	not published
XXL	waist 37 to 40 in	1X	not published	waist 38 to 42 in, hip 48 to 52 in	not published

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.
POPFLEX size guide, read on 2026-09-18.

POPFLEX to SET Active