Halara to Smartwool leggings size

The short answer

Halara M is Smartwool S by the two brands' own charts. 3 of 4 Halara sizes land on a different label at Smartwool.

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 Smartwool. Letter sizes on the left, Letter on the right.
Halara UltraSculpt	Halara builds it for	Smartwool, by chart	Same label	Smartwool builds it for	Smartwool also prints
XXS	waist 24 to 25 in, hip 33.5 to 34.5 in	not made	not published	not published	not published
XS	waist 25.5 to 26.5 in, hip 35 to 36 in	not made	not published	not published	not published
S	waist 27 to 28 in, hip 36.5 to 37.5 in	S	S	waist 29 to 31 in, hip 36 to 38 in	not published
M	waist 28.5 to 30.5 in, hip 38 to 40 in	S	M	waist 29 to 31 in, hip 36 to 38 in	not published
L	waist 31 to 33.5 in, hip 40.5 to 43 in	M	L	waist 32 to 34 in, hip 39 to 41 in	not published
XL	waist 34 to 36.5 in, hip 43.5 to 46 in	L	XL	waist 35 to 37 in, hip 42 to 44 in	not published

Tinted rows change label or sit between two sizes. 2 sizes have no counterpart on the Smartwool 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

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

Smartwool to Halara