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Old Navy to NYDJ jeans size

The short answer

Old Navy 2 is NYDJ 00 by the two brands' own charts. 7 of 9 Old Navy sizes land on a different label at NYDJ.

Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.

On 5 sizes the charts land two or more sizes from the same label. Brands do not measure the body the same way, so on those rows treat the chart answer and the same label as the two ends of a range.

Every Old Navy size read across to NYDJ. US numeric sizes on the left, US numeric on the right.
Old NavyOld Navy builds it forNYDJ, by chartSame labelNYDJ builds it forNYDJ also prints
00waist 24 in, hip 34.5 innot made00not publishednot published
00waist 24 in, hip 34.5 innot made00not publishednot published
2waist 26 in, hip 36.5 in002waist 25 to 26 in, hip 35 to 36 inWaist size 25 · Letter XXS
4waist 27 in, hip 37.5 in04waist 26 to 27 in, hip 36 to 37 inWaist size 26 · Letter XS
6waist 28 in, hip 38.5 in26waist 27 to 28 in, hip 37 to 38 inWaist size 27 · Letter XS
8waist 29 in, hip 39.5 in48waist 28 to 29 in, hip 38 to 39 inWaist size 28 · Letter S
10waist 30 in, hip 40.5 in610waist 29 to 30 in, hip 39 to 40 inWaist size 29 · Letter S
12waist 31.5 in, hip 42 in1012waist 31 to 32.5 in, hip 41 to 42.5 inWaist size 31 · Letter M
14waist 33.5 in, hip 44 in1214waist 32.5 to 34 in, hip 42.5 to 44 inWaist size 32 · Letter L
16waist 36.3 in, hip 46.5 in1616waist 35.5 to 37 in, hip 45.5 to 47 inWaist size 34 · Letter XL
18waist 39 in, hip 49 in1818waist 37 to 38.5 in, hip 47 to 48.5 inLetter XL
20waist 42 in, hip 51.5 innot madenot publishednot publishednot published
22waist 44.3 in, hip 53.8 innot madenot publishednot publishednot published
24waist 46.6 in, hip 56.1 innot madenot publishednot publishednot published
26waist 49 in, hip 58.5 innot madenot publishednot publishednot published
28waist 51.5 in, hip 61 innot madenot publishednot publishednot published
30waist 54 in, hip 63.5 innot madenot publishednot publishednot published
Tinted rows change label or sit between two sizes. 8 sizes have no counterpart on the NYDJ 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

NYDJ to Old Navy