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| RAF Size | UK inches | cms | USA | Europe | Australia |
| xs | 34-36 | 86.5-91.5 | 34-36 | 44-46 | 44-46 |
| s | 36-38 | 91.5-96.5 | 36-38 | 46-48 | 46-48 |
| m | 38-40 | 96.5-101.5 | 38-40 | 48-50 | 48-50 |
| l | 40-42 | 101.5-106.5 | 40-42 | 50-52 | 50-52 |
| xl | 42-44 | 106.5-112 | 42-44 | 52-54 | 52-54 |
| xxl | 44-46 | 112-117 | 44-46 | 54-56 | 54-56 |
| RAF Size | UK chest | Collar inches | USA | Europe | Australia |
| s | 36-38 | 14.5 | 37 | 37 | 14.5 |
| m | 38-40 | 15.5 | 39 | 39 | 15.5 |
| l | 40-42 | 16.5 | 41 | 41 | 16.5 |
| xl | 42-44 | 17.5 | 43 | 43 | 17.5 |
| xxl | 44-46 | 18.5 | 45 | 45 | 18.5 |
| RAF Size | UK | cms | USA | Europe | Australia |
| 30 | 30 | 76.5 | 30 | ||
| 32 | 32 | 81.5 | 32 | ||
| 34 | 34 | 86.5 | 34 | ||
| 36 | 36 | 91.5 | 36 | ||
| 38 | 38 | 96.5 | 36 |
| RAF Size | UK | USA | Europe | Australia | |
| s | 30-32 | 30-32 | |||
| m | 32-34 | 32-34 | |||
| l | 34-36 | 34-36 | |||
| xl | 36-38 | 36-38 | |||
| xxl | 38-40 | 38-40 |
| RAF Size | UK inches | cms | USA | Europe | Australia |
| 8 | 32-34 | 81-86 | 4 | 36 | 10 |
| 10 | 34-36 | 86-91 | 6 | 38 | 12 |
| 12 | 36-38 | 91-96 | 8 | 40 | 14 |
| 14 | 38-40 | 96-101 | 10 | 42 | 16 |
| 16 | 40-42 | 101-106 | 12 | 44 | 18 |
| 18 | 42-44 | 106-111 | 14 | 46 | 20 |
| RAF Size | Chest | Waist | Height | ||
| 3/4 years | 55.5 | 52 | 104 | ||
| 5/6 years | 60 | 55.5 | 116 | ||
| 7/8 years | 64 | 58 | 128 | ||
| 9/10 years | 69 | 62 | 140 |
