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Convert / Leggings

Spanx to Smartwool leggings size

The short answer

Spanx M is Smartwool S by the two brands' own charts. 6 of 7 Spanx 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 Spanx size read across to Smartwool. Letter sizes on the left, Letter on the right.
SpanxSpanx builds it forSmartwool, by chartSame labelSmartwool builds it forSmartwool also prints
XSwaist 25 to 27 in, hip 34 to 36 innot madenot publishednot publishednot published
Swaist 27 to 29 in, hip 36 to 38 inSSwaist 29 to 31 in, hip 36 to 38 innot published
Mwaist 29 to 31 in, hip 38 to 40 inSMwaist 29 to 31 in, hip 36 to 38 innot published
Lwaist 31 to 33.5 in, hip 40 to 42.5 inMLwaist 32 to 34 in, hip 39 to 41 innot published
XLwaist 33.5 to 36 in, hip 42.5 to 45 inLXLwaist 35 to 37 in, hip 42 to 44 innot published
1Xwaist 36 to 39 in, hip 45 to 48 inL or XLnot publishedwaist 35 to 37 in, hip 42 to 44 innot published
2Xwaist 39 to 42 in, hip 48 to 51 inXL or XXLnot publishedwaist 38 to 40 in, hip 45 to 48 innot published
3Xwaist 42 to 45 in, hip 51 to 54 inXXLnot publishedwaist 41 to 44 in, hip 49 to 51 innot published
Tinted rows change label or sit between two sizes. 1 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

Smartwool to Spanx