SET Active to Aerie (OFFLINE) leggings size

The short answer

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

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 Aerie (OFFLINE). Letter sizes on the left, Letter on the right.
SET Active	SET Active builds it for	Aerie (OFFLINE), by chart	Same label	Aerie (OFFLINE) builds it for	Aerie (OFFLINE) also prints
XS	waist 22 to 24 in	XXS	XS	waist 22.5 to 23.5 in, hip 32 to 33 in	US numeric 000-00
S	waist 25 to 27 in	XS or S	S	waist 24.5 to 25.5 in, hip 34 to 35 in	US numeric 0-2
M	waist 28 to 30 in	M	M	waist 28.5 to 29.5 in, hip 38 to 39 in	US numeric 8-10
L	waist 31 to 33 in	L	L	waist 31 to 32.5 in, hip 40.5 to 42 in	US numeric 12-14
XL	waist 34 to 36 in	XL	XL	waist 34 to 36 in, hip 43.5 to 45.5 in	US numeric 16-18
XXL	waist 37 to 40 in	XXL	XXL	waist 38 in, hip 47.5 in	US numeric 20

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.
Aerie (OFFLINE) size guide, read on 2026-09-18. Aerie (OFFLINE) on TrueToSize

Aerie (OFFLINE) to SET Active