Viper Men's Shirts & Jackets Size Guide
| UK Size | Chest (Approx) |
| Small | 36" - 38" |
| Medium | 38" - 40" |
| Large | 40" - 42" |
| XL | 42" - 44" |
| XXL | 44" - 46" |
| 3XL | 46" - 48" |
| UK Size | Chest (Approx) |
| Small | 36" - 38" |
| Medium | 38" - 40" |
| Large | 40" - 42" |
| XL | 42" - 44" |
| XXL | 44" - 46" |
| 3XL | 46" - 48" |