SET Active to Fabletics leggings size

The short answer

SET Active XS is Fabletics XXS by the two brands' own charts. 3 of 6 SET Active sizes land on a different label at Fabletics.

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

Every SET Active size read across to Fabletics. Letter sizes on the left, Letter on the right.
SET Active	SET Active builds it for	Fabletics, by chart	Same label	Fabletics builds it for	Fabletics also prints
XS	waist 22 to 24 in	XXS	XS	waist 24 to 25 in, hip 33 to 35 in	US numeric 00
S	waist 25 to 27 in	XS	S	waist 25.5 to 26.5 in, hip 36 to 37 in	US numeric 0-2
M	waist 28 to 30 in	M	M	waist 29 to 31 in, hip 39 to 41 in	US numeric 8-10
L	waist 31 to 33 in	L	L	waist 32 to 34 in, hip 42 to 44 in	US numeric 12-14
XL	waist 34 to 36 in	XL	XL	waist 35 to 37 in, hip 45 to 47 in	US numeric 16-18
XXL	waist 37 to 40 in	XXL/1X	XXL/1X	waist 38 to 41 in, hip 48 to 51 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

SET Active size guide, read on 2026-09-18.
Fabletics size guide, read on 2026-09-18. Fabletics on TrueToSize

Fabletics to SET Active