Gwynne Zip Jacket Size Chart
| Measurement (inches) | Chest | Front | Back | Sleeve Length | Sleeve Opening | Neck |
| Small | 44 | 22 | 26 | 25 | 19 | 19.5 |
| Medium | 46 | 22 | 26 | 26 | 20 | 20.5 |
| Large | 48 | 22 | 26 | 26 | 20 | 21.5 |
| XLarge | 52 | 22 | 26.5 | 26.5 | 21 | 22 |
| 2XL | 56 | 23 | 27 | 27 | 22 | 22.5 |
| 3XL | 60 | 23 | 27.5 | 27.5 | 24 | 23 |
| 4XL | 64 | 23 | 27.5 | 27.5 | 25 | 23.5 |