Gymshark to adidas leggings size

The short answer

Gymshark XXS is adidas XS by the two brands' own charts. 2 of 7 Gymshark sizes land on a different label at adidas.

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

Every Gymshark size read across to adidas. Letter sizes on the left, Letter on the right.
Gymshark	Gymshark builds it for	adidas, by chart	Same label	adidas builds it for	adidas also prints
XXS	waist 24 in, hip 35.5 in	XS	2XS	waist 24 to 26 in, hip 33.5 to 35.5 in, inseam 31 in	US numeric 0-2
XS	waist 26 in, hip 37.5 in	XS	XS	waist 24 to 26 in, hip 33.5 to 35.5 in, inseam 31 in	US numeric 0-2
S	waist 28 in, hip 39.5 in	S	S	waist 26.5 to 28.5 in, hip 36 to 38 in, inseam 31 in	US numeric 4-6
M	waist 30 in, hip 41.5 in	M	M	waist 29 to 31 in, hip 38.5 to 40.5 in, inseam 31.5 in	US numeric 8-10
L	waist 32 in, hip 43.5 in	L	L	waist 31.5 to 33.5 in, hip 41 to 43 in, inseam 31.5 in	US numeric 12-14
XL	waist 34 in, hip 45.5 in	XL	XL	waist 34 to 37 in, hip 43.5 to 46 in, inseam 31.5 in	US numeric 16-18
XXL	waist 36 in, hip 47.7 in	XL	2XL	waist 34 to 37 in, hip 43.5 to 46 in, inseam 31.5 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.

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Sources

Gymshark size guide, read on 2026-09-17. Gymshark on TrueToSize
adidas size guide, read on 2026-09-18. adidas on TrueToSize

adidas to Gymshark