To find the right size for your child, choose the size based on your child's measurements and age. For example, the 3-4 Y size is suitable for children between 3-4 years old.
| Age | 1-2 Y | 3-4 Y | 5-6 Y | 7-8 Y | 9-10 Y |
| head circumference cm | 49-50,5 | 51-52 | 52,5-53,5 | 53,5-54,5 | 54,5-56 |
