Knox Shirt Size Chart
| Men's UK Size | Chest (Inches) | Chest (cm) | Waist (Inches) | Waist (cm) |
| S | 35-37 | 90-96 | 30 | 76 |
| M | 38-40 | 98-103 | 32 | 81 |
| L | 41-43 | 104-109 | 34 | 87 |
| XL | 44-46 | 110-115 | 36 | 92 |
| 2XL | 46-48 | 116-121 | 38 | 97 |
| 3XL | 48-50 | 122-127 | 40 | 102 |
| 4XL | 50-52 | 128-134 | 42 | 107 |
| 5XL | 52-54 | 135-141 | 44 | 112 |