Bo+Tee to Under Armour leggings size

The short answer

Bo+Tee XS is Under Armour XXS by the two brands' own charts. 4 of 6 Bo+Tee 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.

Every Bo+Tee size read across to Under Armour. Letter sizes on the left, Letter on the right.
Bo+Tee	Bo+Tee builds it for	Under Armour, by chart	Same label	Under Armour builds it for	Under Armour also prints
XXS	waist 22.1 to 23.6 in, hip 33.1 to 34.7 in	not made	XXS	not published	not published
XS	waist 23.6 to 25.2 in, hip 34.7 to 36.2 in	XXS	XS	waist 24.5 to 25.5 in, hip 33 to 34.5 in	US numeric 00
S	waist 26.8 in, hip 37.8 in	XS	not published	waist 25.5 to 27 in, hip 34.5 to 36 in	US numeric 0-2
M	waist 28.4 to 29.9 in, hip 39.4 to 40.9 in	MD	not published	waist 29 to 31 in, hip 38 to 40 in	US numeric 8-10
L	waist 31.5 in, hip 42.5 in	LG	not published	waist 31 to 34 in, hip 40 to 43 in	US numeric 12-14
XL	waist 33.1 to 36.2 in, hip 44.1 to 46.1 in	XL	XL	waist 34 to 37 in, hip 43 to 46 in	US numeric 16
XXL	waist 38.6 in, hip 48.4 in	XXL	XXL	waist 37 to 40 in, hip 46 to 49 in	US numeric 18

Tinted rows change label or sit between two sizes. 1 sizes have no counterpart on the Under Armour chart. 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

Bo+Tee size guide, read on 2026-09-18.
Under Armour size guide, read on 2026-09-17. Under Armour on TrueToSize

Under Armour to Bo+Tee