Jack Pyke Childrens Shirt & Jacket Size Guide
| Age (yrs) | UK Size | Chest (Inch) |
| 0-1 | 3XS | 16"-18" |
| 1-2 | XXS | 18"-20" |
| 3-4 | XS | 20"-22" |
| 5-6 | Small | 22"-24" |
| 7-8 | Medium | 24"-26" |
| 9-10 | Large | 26"-28" |
| 11-12 | XL | 28"-32" |
| Age (yrs) | UK Size | Chest (Inch) |
| 0-1 | 3XS | 16"-18" |
| 1-2 | XXS | 18"-20" |
| 3-4 | XS | 20"-22" |
| 5-6 | Small | 22"-24" |
| 7-8 | Medium | 24"-26" |
| 9-10 | Large | 26"-28" |
| 11-12 | XL | 28"-32" |