Old Navy to American Eagle size
The short answer
Old Navy XL is American Eagle XXL by the two brands' own charts. 2 of 7 Old Navy sizes land on a different label at American Eagle.
Both brands publish the body chest each size is cut for, so every row matches a chest, not a letter.
On 1 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.
| Old Navy | Old Navy builds it for | American Eagle, by chart | Same label | American Eagle builds it for | American Eagle also prints |
|---|---|---|---|---|---|
| XS | chest 36 to 37 in, neck 13 to 13.5 in, sleeve 31.5 to 32 in | XS or S | XS | chest 35 to 36 in, neck 13.5 to 14 in, sleeve 31.5 in | not published |
| S | chest 38 to 39 in, neck 14 to 14.5 in, sleeve 32.5 to 33 in | S | S | chest 37 to 39 in, neck 14.5 to 15 in, sleeve 32.5 in | not published |
| M | chest 40 to 42 in, neck 15 to 15.5 in, sleeve 33.5 to 34 in | M | M | chest 40 to 42 in, neck 15 to 15.5 in, sleeve 33.5 in | not published |
| L | chest 44 to 46 in, neck 16 to 16.5 in, sleeve 34.5 to 35 in | L | L | chest 43 to 45 in, neck 15.5 to 16 in, sleeve 34.5 in | not published |
| XL | chest 48 to 50 in, neck 17 to 17.5 in, sleeve 35.5 to 36 in | XXL | XL | chest 49 to 51 in, neck 17 to 18 in, sleeve 36.5 in | not published |
| XXL | chest 51 to 53 in, neck 18 to 18.5 in, sleeve 36.5 to 37 in | XXXL | XXL | chest 52 to 54 in, neck 18 to 19 in, sleeve 37 in | not published |
| XXXL | chest 55 to 57 in, neck 19 to 19.5 in, sleeve 37.5 to 38 in | XXXL | XXXL | chest 52 to 54 in, neck 18 to 19 in, sleeve 37 in | not published |
| XXXXL | chest 58 to 60 in, neck 20.5 to 21 in, sleeve 38.5 to 39 in | not made | not published | not published | not published |
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.
Sources
- Old Navy size guide, read on 2026-09-18. Old Navy on TrueToSize
- American Eagle size guide, read on 2026-09-18. American Eagle on TrueToSize