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Convert / Women's clothing

Whistles to Under Armour clothing size

The short answer

Whistles 14 is Under Armour MD 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 Whistles size read across to Under Armour. UK sizes on the left, Letter on the right.
WhistlesWhistles builds it forUnder Armour, by chartSame labelUnder Armour builds it forUnder Armour also prints
04bust 30 in, waist 23.5 in, hip 34.5 innot madenot publishednot publishednot published
06bust 31 in, waist 24.5 in, hip 35.5 inXXSnot publishedbust 31 to 32.5 in, waist 24.5 to 25.5 inUS 00
08bust 32 in, waist 25.5 in, hip 36.5 inXXSnot publishedbust 31 to 32.5 in, waist 24.5 to 25.5 inUS 00
10bust 34 in, waist 27.5 in, hip 38.5 inSMnot publishedbust 33.5 to 36 in, waist 27 to 29 inUS 4-6
12bust 36 in, waist 29.5 in, hip 40.5 inMDnot publishedbust 36 to 38 in, waist 29 to 31 inUS 8-10
14bust 38 in, waist 31.5 in, hip 42.5 inMDnot publishedbust 36 to 38 in, waist 29 to 31 inUS 8-10
16bust 40 in, waist 33.5 in, hip 44.5 inLGnot publishedbust 38 to 41 in, waist 31 to 34 inUS 12-14
18bust 42.5 in, waist 35.5 in, hip 46.5 inXLnot publishedbust 41 to 44 in, waist 34 to 37 inUS 16
20bust 45 in, waist 38 in, hip 49 inXXLnot publishedbust 44 to 47 in, waist 37 to 40 inUS 18
Tinted rows change label or sit between two sizes. 1 sizes have no counterpart on the Under Armour chart. 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 Whistles