Size Chart - GP420
| GP420 | Width (IN) | Length (IN) | Sleeve Center Back (IN) |
| S | 18 | 28 | 16.25 |
| M | 20 | 29 | 17.75 |
| L | 22 | 30 | 19 |
| XL | 24 | 31 | 20.25 |
| 2XL | 26 | 32 | 21.5 |
| 3XL | 28 | 33 | 22.75 |
| GP420 | Width (IN) | Length (IN) | Sleeve Center Back (IN) |
| S | 18 | 28 | 16.25 |
| M | 20 | 29 | 17.75 |
| L | 22 | 30 | 19 |
| XL | 24 | 31 | 20.25 |
| 2XL | 26 | 32 | 21.5 |
| 3XL | 28 | 33 | 22.75 |