Richard James x Castore Jacket Size Guide
| Castore Size | Chest (In) | Chest (cm) |
| XS | 36-38 | 91-96 |
| S | 38-40 | 96-101 |
| M | 40-42 | 101-106 |
| L | 42-44 | 106-111 |
| XL | 44-46 | 111-116 |
| XXL | 46-48 | 116-121 |
| XXXL | 48-50 | 121-126 |
| Castore Size | Chest (In) | Chest (cm) |
| XS | 36-38 | 91-96 |
| S | 38-40 | 96-101 |
| M | 40-42 | 101-106 |
| L | 42-44 | 106-111 |
| XL | 44-46 | 111-116 |
| XXL | 46-48 | 116-121 |
| XXXL | 48-50 | 121-126 |