Lululemon to Brooks Brothers size
The short answer
lululemon XL is Brooks Brothers L by the two brands' own charts. 1 of 6 lululemon sizes land on a different label at Brooks Brothers.
Both brands publish the body chest each size is cut for, so every row matches a chest, not a letter.
| lululemon | lululemon builds it for | Brooks Brothers, by chart | Same label | Brooks Brothers builds it for | Brooks Brothers also prints |
|---|---|---|---|---|---|
| XS | chest 35 to 36 in | XS | XS | chest 34 to 36 in, waist 28 to 30 in, sleeve 32 in | not published |
| S | chest 37 to 38 in | S | S | chest 36 to 38 in, waist 30 to 32 in, sleeve 33 in | not published |
| M | chest 39 to 40 in | M | M | chest 38 to 40 in, waist 32 to 34 in, sleeve 35 in | not published |
| L | chest 41 to 42 in | L or M | L | chest 42 to 44 in, waist 36 to 38 in, sleeve 36 in | not published |
| XL | chest 43 to 45 in | L | XL | chest 42 to 44 in, waist 36 to 38 in, sleeve 36 in | not published |
| XXL | chest 46 to 48 in | XXL | XXL | chest 46 to 48 in, waist 44 to 46 in, sleeve 37 in | not published |
| 3XL | chest 50 to 52 in | not made | not published | not published | not published |
| 4XL | chest 53 to 55 in | not made | not published | not published | not published |
| 5XL | chest 56 to 58 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
- lululemon size guide, read on 2026-09-18. lululemon on TrueToSize
- Brooks Brothers size guide, read on 2026-09-18.