Adidas to American Eagle size
The short answer
adidas S is American Eagle XS by the two brands' own charts. 6 of 7 adidas 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 2 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.
| adidas | adidas builds it for | American Eagle, by chart | Same label | American Eagle builds it for | American Eagle also prints |
|---|---|---|---|---|---|
| XS | chest 32.5 to 34 in, waist 27.5 to 29 in, hip 32 to 33.5 in | XS | XS | chest 35 to 36 in, neck 13.5 to 14 in, sleeve 31.5 in | not published |
| S | chest 34.5 to 36 in, waist 29.5 to 31.5 in, hip 34 to 36 in | XS | S | chest 35 to 36 in, neck 13.5 to 14 in, sleeve 31.5 in | not published |
| M | chest 36.5 to 39 in, waist 32 to 34.5 in, hip 36.5 to 39 in | S | M | chest 37 to 39 in, neck 14.5 to 15 in, sleeve 32.5 in | not published |
| L | chest 39.5 to 42.5 in, waist 35 to 38 in, hip 39.5 to 42 in | M | L | chest 40 to 42 in, neck 15 to 15.5 in, sleeve 33.5 in | not published |
| XL | chest 43 to 46.5 in, waist 38.5 to 42 in, hip 42.5 to 45.5 in | L | XL | chest 43 to 45 in, neck 15.5 to 16 in, sleeve 34.5 in | not published |
| 2XL | chest 47 to 51 in, waist 42.5 to 47 in, hip 46 to 49 in | XXL | XXL | chest 49 to 51 in, neck 17 to 18 in, sleeve 36.5 in | not published |
| 3XL | chest 51.5 to 56 in, waist 47.5 to 52 in, hip 49.5 to 53 in | XXXL | XXXL | chest 52 to 54 in, neck 18 to 19 in, sleeve 37 in | 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
- adidas size guide, read on 2026-09-18. adidas on TrueToSize
- American Eagle size guide, read on 2026-09-18. American Eagle on TrueToSize