Next to Under Armour size
The short answer
Next XXS is Under Armour XS by the two brands' own charts. 8 of 10 Next sizes land on a different label at Under Armour.
Both brands publish the body chest each size is cut for, so every row matches a chest, not a letter.
| Next | Next builds it for | Under Armour, by chart | Same label | Under Armour builds it for | Under Armour also prints |
|---|---|---|---|---|---|
| XXS | chest 30 to 32 in | XS | not published | chest 31 to 34 in, waist 28 to 29 in | not published |
| XS | chest 33 to 35 in | XS | XS | chest 31 to 34 in, waist 28 to 29 in | not published |
| S | chest 36 to 38 in | SM | not published | chest 34 to 37 in, waist 29 to 31 in | not published |
| M | chest 39 to 41 in | MD | not published | chest 37 to 41 in, waist 31 to 34 in | not published |
| L | chest 42 to 44 in | LG | not published | chest 41 to 44 in, waist 34 to 37 in | not published |
| XL | chest 45 to 47 in | XL | XL | chest 44 to 48 in, waist 37 to 41 in | not published |
| 2XL | chest 48 to 50 in | XXL | XXL | chest 48 to 52 in, waist 41 to 45.5 in | not published |
| 3XL | chest 51 to 53 in | XXL | 3XL | chest 48 to 52 in, waist 41 to 45.5 in | not published |
| 4XL | chest 54 to 56 in | 3XL | 4XL | chest 52 to 56 in, waist 45.5 to 50 in | not published |
| 5XL | chest 57 to 59 in | 4XL | 5XL | chest 56 to 60 in, waist 50 to 54.5 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
- Next size guide, read on 2026-09-18.
- Under Armour size guide, read on 2026-09-18. Under Armour on TrueToSize