Halara to Decathlon leggings size

The short answer

Halara XXS is Decathlon 2XS by the two brands' own charts. 1 of 6 Halara sizes land on a different label at Decathlon.

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

Every Halara UltraSculpt size read across to Decathlon. Letter sizes on the left, Letter on the right.
Halara UltraSculpt	Halara builds it for	Decathlon, by chart	Same label	Decathlon builds it for	Decathlon also prints
XXS	waist 24 to 25 in, hip 33.5 to 34.5 in	2XS	2XS	waist 23.6 to 24.8 in, hip 31.1 to 33.5 in	not published
XS	waist 25.5 to 26.5 in, hip 35 to 36 in	XS	XS	waist 25.2 to 26.8 in, hip 33.5 to 35.4 in	not published
S	waist 27 to 28 in, hip 36.5 to 37.5 in	S	S	waist 27.2 to 28.7 in, hip 35.4 to 37.8 in	not published
M	waist 28.5 to 30.5 in, hip 38 to 40 in	M	M	waist 29.1 to 31.1 in, hip 37.8 to 40.2 in	not published
L	waist 31 to 33.5 in, hip 40.5 to 43 in	L	L	waist 31.5 to 33.9 in, hip 40.2 to 42.5 in	not published
XL	waist 34 to 36.5 in, hip 43.5 to 46 in	XL	XL	waist 34.3 to 36.6 in, hip 42.5 to 44.9 in	not published

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

Halara UltraSculpt size guide, read on 2026-09-18. Halara on TrueToSize
Decathlon size guide, read on 2026-09-18.

Decathlon to Halara