Aerie (OFFLINE) to Zella leggings size

The short answer

Aerie (OFFLINE) M is Zella M by the two brands' own charts. 0 of 7 Aerie (OFFLINE) 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 Aerie (OFFLINE) size read across to Zella. Letter sizes on the left, Letter on the right.
Aerie (OFFLINE)	Aerie (OFFLINE) builds it for	Zella, by chart	Same label	Zella builds it for	Zella also prints
XXS	waist 22.5 to 23.5 in, hip 32 to 33 in	XXS	XXS	waist 24 in, hip 33.5 in	US numeric 00
XS	waist 24.5 to 25.5 in, hip 34 to 35 in	XS	XS	waist 25 to 26 in, hip 34.5 to 35.5 in	US numeric 0-2
S	waist 26.5 to 27.5 in, hip 36 to 37 in	S	S	waist 27 to 28 in, hip 36.5 to 37.5 in	US numeric 4-6
M	waist 28.5 to 29.5 in, hip 38 to 39 in	M	M	waist 29 to 30 in, hip 38.5 to 39.5 in	US numeric 8-10
L	waist 31 to 32.5 in, hip 40.5 to 42 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, hip 43.5 to 45.5 in	XL	XL	waist 35.5 in, hip 45.5 in	US numeric 16
XXL	waist 38 in, hip 47.5 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

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

Zella to Aerie (OFFLINE)