Tracksmith to Gymshark leggings size

The short answer

Tracksmith XS is Gymshark XXS by the two brands' own charts. 6 of 6 Tracksmith sizes land on a different label at Gymshark.

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

Every Tracksmith Women's Strata Short Tights size read across to Gymshark. Letter sizes on the left, Letter on the right.
Tracksmith Women's Strata Short Tights	Tracksmith builds it for	Gymshark, by chart	Same label	Gymshark builds it for	Gymshark also prints
XS	waist 23 to 25 in, hip 32 to 34 in	XXS	XS	waist 24 in, hip 35.5 in	US numeric 2-4
S	waist 25 to 27 in, hip 34 to 36 in	XS	S	waist 26 in, hip 37.5 in	US numeric 4-6
M	waist 27 to 29 in, hip 36 to 38 in	S	M	waist 28 in, hip 39.5 in	US numeric 6-8
L	waist 29 to 31 in, hip 38 to 40 in	M	L	waist 30 in, hip 41.5 in	US numeric 8-10
XL	waist 31 to 33 in, hip 40 to 42 in	L	XL	waist 32 in, hip 43.5 in	US numeric 10-12
XXL	waist 33 to 35 in, hip 42 to 44 in	XL	XXL	waist 34 in, hip 45.5 in	US numeric 12-14

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

Tracksmith Women's Strata Short Tights size guide, read on 2026-09-18.
Gymshark size guide, read on 2026-09-17. Gymshark on TrueToSize

Gymshark to Tracksmith