Tough Duck Size Guide
| MEN'S | SM | MED | LG | XL | 2XL | 3XL | 4XL |
| Neck | 14-14.5 | 15-15.5 | 16-16.5 | 17-17.5 | 18-18.5 | 19-19.5 | 20-20.5 |
| Chest | 35-37 | 38-40 | 42-44 | 46-48 | 49-51 | 52-54 | 55-57 |
| Waist | 29-31 | 32-34 | 36-38 | 40-42 | 43-45 | 46-48 | 49.51 |
| LADIES' | XS | SM | MED | LG | XL | 2XL |
| Chest | 33-34 | 35-36 | 37-39 | 40-42 | 43-46 | 47-50 |
| Waist | 28-29 | 30-31 | 33-34 | 36-37 | 39-40 | 42-43 |