Apsley shirt
| Collar Size | Letter Size Equivalent | Chest Circumference (Inches) | Shoulder Width (Inches) |
| 14.5" | XS | 39.4" | 16.5" |
| 15" | S | 41.3" | 17.3" |
| 15.5" | M | 43.3" | 18.0" |
| 16" | L | 45.3" | 18.8" |
| 16.5" | XL | 47.2" | 19.5" |
| 17" | 2XL | 49.2" | 20.3" |
| 17.5" | 3XL | 51.2" | 21.0" |
| 18" | 4XL | 53.1" | 21.8" |