284 All Purpose Baselayer Size Guide
| Available Colours | Black / Red / Navy / White / Royal |
| International Size | SY | MY | LY | XLY | S | M | L | XL | 2XL | 3XL |
| Years | 8/9 | 10/11 | 12/13 | |||||||
| Chest Inches (to fit) | 26/28 | 28/30 | 30/32 | 32/34 | 34/36 | 38/40 | 42/44 | 46 | 48 | 50 |
| Chest cm (to fit) | 66/71 | 71/76 | 76/81 | 81/86 | 86/91 | 97/102 | 107/112 | 117 | 122 | 127 |