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Convert / Women's clothing

Boden to Under Armour clothing size

The short answer

Boden 4 is Under Armour SM by the two brands' own charts.

Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.

Every Boden size read across to Under Armour. US sizes on the left, Letter on the right.
BodenBoden builds it forUnder Armour, by chartSame labelUnder Armour builds it forUnder Armour also prints
2bust 32 to 33 in, waist 25 to 26 in, hip 34 to 35 inXSXSbust 32.5 to 33.5 in, waist 25.5 to 27 inUS 0-2
4bust 33.3 to 34 in, waist 26.3 to 27 in, hip 35.3 to 36 inSMnot publishedbust 33.5 to 36 in, waist 27 to 29 inUS 4-6
6bust 34.3 to 35 in, waist 27.3 to 28 in, hip 36.3 to 37 inSMnot publishedbust 33.5 to 36 in, waist 27 to 29 inUS 4-6
8bust 35.5 to 37 in, waist 28.5 to 30 in, hip 37.5 to 39 inMDnot publishedbust 36 to 38 in, waist 29 to 31 inUS 8-10
10bust 37.5 to 39 in, waist 30.5 to 32 in, hip 39.5 to 41 inLGnot publishedbust 38 to 41 in, waist 31 to 34 inUS 12-14
12bust 39.5 to 41 in, waist 32.5 to 34 in, hip 41.5 to 43 inLGnot publishedbust 38 to 41 in, waist 31 to 34 inUS 12-14
14bust 41.5 to 43 in, waist 34.5 to 36 in, hip 43.5 to 45 inXLnot publishedbust 41 to 44 in, waist 34 to 37 inUS 16
16bust 43.5 to 45 in, waist 36.5 to 38 in, hip 45.5 to 47 inXXLXLbust 44 to 47 in, waist 37 to 40 inUS 18
18bust 45.5 to 47.5 in, waist 38.5 to 40.5 in, hip 47.5 to 49.5 inXXLXLbust 44 to 47 in, waist 37 to 40 inUS 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, not a fit. We do not collect fit reports for this category yet, so this table is the two brands' own claims and nothing more.

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Sources

Under Armour to Boden