| Percy Shirt | Chest Circumference |
Body Length (top of back to hem) |
| 3M (0 to 3 months) | 45cm | 27cm |
| 6M (3 to 6 months) | 50cm | 29cm |
| 9M (6 to 9 months) | 54cm | 30.5cm |
| 12M (9 to 12 months) | 60cm | 31.5cm |
| 18M (12 to 18 months) | 64cm | 36.5cm |
| 24M (2T) | 70cm | 40.5cm |
| 36M (3T) | 74cm | 44.5cm |
