Gwynne Zip Jacket Size Chart
| Size | Front Length | Chest Width | Back Length | Sleeve Length | Sleeve Opening | Neck Opening |
| S | 22" | 22" | 26" | 25" | 5.5" | 9.75" |
| M | 22" | 23" | 26" | 26" | 5.5" | 10.25" |
| L | 22" | 24" | 26" | 26" | 5.5" | 10.75" |
| XL | 22" | 26" | 26.5" | 26.5" | 6" | 11" |
| 2XL | 23" | 28" | 27" | 27" | 6.5" | 11.25" |
| 3XL | 23" | 30" | 27.5" | 27.5" | 6.5" | 11.5" |
| 4XL | 23" | 32" | 27.5" | 27.5" | 6.5" | 11.75" |