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Buffbunny to Gymshark leggings size

The short answer

Buffbunny XXS/00 is Gymshark XXS by the two brands' own charts. 7 of 7 Buffbunny sizes land on a different label at Gymshark.

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

Every Buffbunny size read across to Gymshark. Letter sizes on the left, Letter on the right.
BuffbunnyBuffbunny builds it forGymshark, by chartSame labelGymshark builds it forGymshark also prints
XXS/00waist 24 to 25 in, hip 33 to 35 inXXSnot publishedwaist 24 in, hip 35.5 inUS numeric 2-4
XS/0-2waist 25 to 27 in, hip 36 to 37 inXSnot publishedwaist 26 in, hip 37.5 inUS numeric 4-6
S/4-6waist 27 to 28 in, hip 38 to 39 inSnot publishedwaist 28 in, hip 39.5 inUS numeric 6-8
M/6-8waist 29 to 31 in, hip 39 to 41 inMnot publishedwaist 30 in, hip 41.5 inUS numeric 8-10
L/10-12waist 32 to 34 in, hip 42 to 44 inL or XLnot publishedwaist 32 in, hip 43.5 inUS numeric 10-12
XL/14-16waist 35 to 37 in, hip 45 to 47 inXXLnot publishedwaist 36 in, hip 47.7 inUS numeric 14-16
XXL/16-18waist 37 to 39 in, hip 47 to 49 inXXLnot publishedwaist 36 in, hip 47.7 inUS numeric 14-16
XXXL/18-20waist 39 to 41 in, hip 50 to 52 innot madenot publishednot publishednot published
Tinted rows change label or sit between two sizes. 1 sizes have no counterpart on the Gymshark 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

Gymshark to Buffbunny