The following size charts are a guide to help you choose the correct size. However, you should note that these aren't fullproof as sizes can vary between manufactures, even for what appears to be the same measurement. i.e. a size 32" chest in Umbro may not be exactly the same as a size 32" Canterbury for example.
| Size | 22 | 24 | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 | 52 |
| Label (age/size) | 3-4 | 5-6 | 7-8 | 9-10 | 11-12 | 13-14 | XXS | XS | S | M | L | XL | 2XL | 3XL | 4XL | 5XL |
| Chest (in.) | 22 | 24 | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 | 52 |
| Waist (in.) | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 |
| Inside leg (in.) | 15.5 | 18.5 | 20.5 | 23 | 25.5 | 28 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 |
| Neck (in.) | 15 | 15.5 | 16 | 16.5 | 17 | 17.5 | 18 | 18.5 | 19 |