Gymshark to Spanx leggings size

The short answer

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

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 Spanx. Letter sizes on the left, Letter on the right.
Gymshark	Gymshark builds it for	Spanx, by chart	Same label	Spanx builds it for	Spanx also prints
XXS	waist 24 in, hip 35.5 in	XS	not published	waist 25 to 27 in, hip 34 to 36 in	US numeric 0-2
XS	waist 26 in, hip 37.5 in	XS	XS	waist 25 to 27 in, hip 34 to 36 in	US numeric 0-2
S	waist 28 in, hip 39.5 in	S	S	waist 27 to 29 in, hip 36 to 38 in	US numeric 4-6
M	waist 30 in, hip 41.5 in	M	M	waist 29 to 31 in, hip 38 to 40 in	US numeric 8-10
L	waist 32 in, hip 43.5 in	L	L	waist 31 to 33.5 in, hip 40 to 42.5 in	US numeric 12-14
XL	waist 34 in, hip 45.5 in	XL	XL	waist 33.5 to 36 in, hip 42.5 to 45 in	US numeric 16
XXL	waist 36 in, hip 47.7 in	XL	not published	waist 33.5 to 36 in, hip 42.5 to 45 in	US numeric 16

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

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

Spanx to Gymshark