Oysho to Uniqlo leggings size

The short answer

Oysho XXS is Uniqlo XS by the two brands' own charts. 1 of 7 Oysho sizes land on a different label at Uniqlo.

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

Every Oysho size read across to Uniqlo. Letter sizes on the left, Letter on the right.
Oysho	Oysho builds it for	Uniqlo, by chart	Same label	Uniqlo builds it for	Uniqlo also prints
XXS	waist 24 to 25 in, hip 36 to 37 in	XS	XXS	waist 24 to 26.5 in, hip 34.3 to 36.5 in	not published
XS	waist 25 to 26 in, hip 37 to 38 in	XS	XS	waist 24 to 26.5 in, hip 34.3 to 36.5 in	not published
S	waist 26 to 27 in, hip 38 to 39 in	S	S	waist 25.5 to 28 in, hip 35.8 to 38.3 in	not published
M	waist 27 to 29 in, hip 39 to 41 in	M	M	waist 27.3 to 29.5 in, hip 37.5 to 39.8 in	not published
L	waist 30 to 33 in, hip 42 to 45 in	L	L	waist 29.5 to 32 in, hip 39.8 to 42.3 in	not published
XL	waist 33 to 35 in, hip 45 to 47 in	XL	XL	waist 32 to 34.3 in, hip 42.3 to 44.5 in	not published
XXL	waist 36 to 39 in, hip 48 to 51 in	XXL	XXL	waist 34.3 to 36.5 in, hip 44.5 to 46.8 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

Oysho size guide, read on 2026-09-18. Oysho on TrueToSize
Uniqlo size guide, read on 2026-09-18. Uniqlo on TrueToSize

Uniqlo to Oysho