2XU to Spanx leggings size

The short answer

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

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

Every 2XU Flex & Fluid Tights size read across to Spanx. Letter sizes on the left, Letter on the right.
2XU Flex & Fluid Tights	2XU builds it for	Spanx, by chart	Same label	Spanx builds it for	Spanx also prints
XXS	waist 23 to 24.5 in, hip 33 to 34.5 in	XS	not published	waist 25 to 27 in, hip 34 to 36 in	US numeric 0-2
XS	waist 25 to 26 in, hip 35 to 36.5 in	XS	XS	waist 25 to 27 in, hip 34 to 36 in	US numeric 0-2
S	waist 26.5 to 28 in, hip 37 to 38.5 in	S	S	waist 27 to 29 in, hip 36 to 38 in	US numeric 4-6
M	waist 28.5 to 30 in, hip 39 to 40.5 in	M	M	waist 29 to 31 in, hip 38 to 40 in	US numeric 8-10
L	waist 30.5 to 32 in, hip 41 to 42.5 in	L	L	waist 31 to 33.5 in, hip 40 to 42.5 in	US numeric 12-14
XL	waist 32.5 to 34 in, hip 43 to 44.5 in	L	XL	waist 31 to 33.5 in, hip 40 to 42.5 in	US numeric 12-14

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

2XU Flex & Fluid Tights size guide, read on 2026-09-18.
Spanx size guide, read on 2026-09-18. Spanx on TrueToSize

Spanx to 2XU