Size chart references garment measurements, not body.
| Relaxed/Men (inches) | XS | S | M | L | XL | 2XL | 3XL | 4XL |
| Chest (half measure) | 18 | 19.25 | 20.25 | 21.25 | 22.25 | 23.25 | 24.25 | 25 |
| Body | 27.5 | 28 | 28.75 | 29.25 | 29.75 | 30.25 | 30.75 | 31 |
| Long Sleeve | 29 | 30 | 30.5 | 30.5 | 31 | 31.5 | 33.5 | 34.5 |
| Fitted/Women (inches) | XS | S | M | L | XL | 2XL |
| Chest (half measure) | 17 | 18 | 18.75 | 19.75 | 21 | 22 |
| Body | 25 | 26 | 26.75 | 27 | 27.75 | 29 |
| Long Sleeve | 27 | 27.5 | 28.5 | 29 | 30 | 30.5 |
