Tracksmith to Under Armour leggings size
The short answer
Tracksmith XS is Under Armour XXS by the two brands' own charts. 6 of 6 Tracksmith sizes land on a different label at Under Armour.
Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.
On 1 sizes the charts land two or more sizes from the same label. Brands do not measure the body the same way, so on those rows treat the chart answer and the same label as the two ends of a range.
| Tracksmith Women's Strata Short Tights | Tracksmith builds it for | Under Armour, by chart | Same label | Under Armour builds it for | Under Armour also prints |
|---|---|---|---|---|---|
| XS | waist 23 to 25 in, hip 32 to 34 in | XXS | XS | waist 24.5 to 25.5 in, hip 33 to 34.5 in | US numeric 00 |
| S | waist 25 to 27 in, hip 34 to 36 in | XS | not published | waist 25.5 to 27 in, hip 34.5 to 36 in | US numeric 0-2 |
| M | waist 27 to 29 in, hip 36 to 38 in | SM | not published | waist 27 to 29 in, hip 36 to 38 in | US numeric 4-6 |
| L | waist 29 to 31 in, hip 38 to 40 in | MD | not published | waist 29 to 31 in, hip 38 to 40 in | US numeric 8-10 |
| XL | waist 31 to 33 in, hip 40 to 42 in | LG | XL | waist 31 to 34 in, hip 40 to 43 in | US numeric 12-14 |
| XXL | waist 33 to 35 in, hip 42 to 44 in | LG | XXL | waist 31 to 34 in, hip 40 to 43 in | US numeric 12-14 |
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.
Sources
- Tracksmith Women's Strata Short Tights size guide, read on 2026-09-18.
- Under Armour size guide, read on 2026-09-17. Under Armour on TrueToSize