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Gap to J.Crew clothing size

The short answer

Gap 2 is J.Crew 0 by the two brands' own charts. 11 of 11 Gap sizes land on a different label at J.Crew.

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

Every Gap size read across to J.Crew. US sizes on the left, US on the right.
GapGap builds it forJ.Crew, by chartSame labelJ.Crew builds it forJ.Crew also prints
000bust 30.3 in, waist 24 in, hip 33.3 innot made000not publishednot published
000bust 30.3 in, waist 24 in, hip 33.3 innot made000not publishednot published
000bust 30.3 in, waist 24 in, hip 33.3 innot made000not publishednot published
2bust 33.3 in, waist 26.5 in, hip 36.3 in02bust 33 in, waist 25 inLetter XS · UK 4 · DE 28 · FR 32 · IT 36 · AU 4 · JP 3
4bust 34.3 in, waist 27.5 in, hip 37.3 in24bust 34 in, waist 26 inLetter XS · UK 6 · DE 30 · FR 34 · IT 38 · AU 6 · JP 5
6bust 35.3 in, waist 28.5 in, hip 38.3 in46bust 35 in, waist 27 inLetter S · UK 8 · DE 34 · FR 36 · IT 40 · AU 8 · JP 7
8bust 36.3 in, waist 29.5 in, hip 39.3 in68bust 36 in, waist 28 inLetter S · UK 10 · DE 34 · FR 38 · IT 42 · AU 10 · JP 9
10bust 37.3 in, waist 30.5 in, hip 40.3 in810bust 37 in, waist 29 inLetter M · UK 12 · DE 36 · FR 40 · IT 44 · AU 12 · JP 11
12bust 38.8 in, waist 32 in, hip 41.8 in10 or 1212bust 38 in, waist 30 inLetter M · UK 14 · DE 38 · FR 42 · IT 46 · AU 14 · JP 13
14bust 40.3 in, waist 33.5 in, hip 43.3 in12 or 1414bust 39.5 in, waist 31.5 inLetter L · UK 16 · DE 40 · FR 44 · IT 48 · AU 16 · JP 15
16bust 42 in, waist 35.5 in, hip 45.3 in14 or 1616bust 41 in, waist 33 inLetter L · UK 18 · DE 42 · FR 46 · IT 50 · AU 18 · JP 17
18bust 43.8 in, waist 37.5 in, hip 47.3 in1618bust 43.5 in, waist 35.5 inLetter XL · UK 20 · DE 44 · FR 48 · IT 52 · AU 20 · JP 19
20bust 45.8 in, waist 39.5 in, hip 49.3 in1820bust 46 in, waist 38 inLetter XXL / 1X · UK 22 · DE 46 · FR 50 · IT 54 · AU 22 · JP 21
22bust 47.8 in, waist 41.5 in, hip 51.3 in2022bust 48.5 in, waist 40.5 inLetter 2X · UK 24 · DE 48 · FR 52 · IT 56 · AU 24 · JP 23
Tinted rows change label or sit between two sizes. 3 sizes have no counterpart on the J.Crew 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

J.Crew to Gap