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Convert / Women's clothing

Banana Republic to Athleta clothing size

The short answer

Banana Republic 18 is Athleta 1X 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 Banana Republic size read across to Athleta. US sizes on the left, Letter on the right.
Banana RepublicBanana Republic builds it forAthleta, by chartSame labelAthleta builds it forAthleta also prints
000bust 30.5 in, waist 24 in, hip 33.5 innot madeXXSnot publishednot published
000bust 30.5 in, waist 24 in, hip 33.5 innot madeXXSnot publishednot published
000bust 30.5 in, waist 24 in, hip 33.5 innot madeXXSnot publishednot published
2bust 33.5 in, waist 27 in, hip 36.5 inXSXSbust 32.5 to 33.5 in, waist 25.3 to 26.3 in, hip 35 to 36 inUS 0-2
4bust 34.5 in, waist 28 in, hip 37.5 inSSbust 34.5 to 35.5 in, waist 27.3 to 28.3 in, hip 37 to 38 inUS 4-6
6bust 35.5 in, waist 29 in, hip 38.5 inSSbust 34.5 to 35.5 in, waist 27.3 to 28.3 in, hip 37 to 38 inUS 4-6
8bust 36.5 in, waist 30 in, hip 39.5 inMMbust 36.5 to 37.5 in, waist 29.3 to 30.3 in, hip 39 to 40 inUS 8-10
10bust 37.5 in, waist 31 in, hip 40.5 inMMbust 36.5 to 37.5 in, waist 29.3 to 30.3 in, hip 39 to 40 inUS 8-10
12bust 39 in, waist 32.5 in, hip 42 inLLbust 39 to 40.5 in, waist 31.8 to 33.3 in, hip 41.5 to 43 inUS 12-14
14bust 40.5 in, waist 34 in, hip 43.5 inLLbust 39 to 40.5 in, waist 31.8 to 33.3 in, hip 41.5 to 43 inUS 12-14
16bust 42.5 in, waist 36 in, hip 45.5 inXLXLbust 42 in, waist 34.3 in, hip 44.5 inUS 16-18
18bust 44.5 in, waist 38 in, hip 47.5 in1XXLbust 44.3 to 46.3 in, waist 38 to 40 in, hip 47.3 to 49.3 inUS 16W-18W
20bust 47.5 in, waist 41 in, hip 50.5 in2X or 1Xnot publishedbust 48.3 to 50.8 in, waist 42 to 44.5 in, hip 51.3 to 53.8 inUS 20W-22W
Tinted rows change label or sit between two sizes. 3 sizes have no counterpart on the Athleta 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

Athleta to Banana Republic