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