Tracksmith to Athleta leggings size

The short answer

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

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 Athleta. Letter sizes on the left, Letter on the right.
Tracksmith Women's Strata Short Tights	Tracksmith builds it for	Athleta, by chart	Same label	Athleta builds it for	Athleta also prints
XS	waist 23 to 25 in, hip 32 to 34 in	XXS	XS	waist 24.3 in, hip 34 in	US numeric 00
S	waist 25 to 27 in, hip 34 to 36 in	XS	S	waist 25.3 to 26.3 in, hip 35 to 36 in	US numeric 0-2
M	waist 27 to 29 in, hip 36 to 38 in	S	M	waist 27.3 to 28.3 in, hip 37 to 38 in	US numeric 4-6
L	waist 29 to 31 in, hip 38 to 40 in	M	L	waist 29.3 to 30.3 in, hip 39 to 40 in	US numeric 8-10
XL	waist 31 to 33 in, hip 40 to 42 in	L	XL	waist 31.8 to 33.3 in, hip 41.5 to 43 in	US numeric 12-14
XXL	waist 33 to 35 in, hip 42 to 44 in	XL	not published	waist 34.3 in, hip 44.5 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

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

Athleta to Tracksmith