Approximate sizing for US orders sizes in inches:
| Size | 1/2 Chest Width |
| S | 21.5 |
| M | 22.5 |
| L | 23.5 |
| XL | 24.5 |
| 2XL | 25.5 |
| 3XL | 26.6 |
| 4XL | 27.5 |
Approximate sizing for International orders in centimeters:
| Size | 1/2 Chest Width |
| S | 54.5 |
| M | 57 |
| L | 59.5 |
| XL | 62 |
| 2XL | 64.5 |
| 3XL | 67 |
| 4XL | 69.5 |
