The Navigator glasses 0-2 years are designed for children with head circumference from 34 to 49 cm (340-490 mm). If you have a doubt between 2 measures, we recommend you to take the largest
3-5 years
The Navigator glasses 3-5 years are designed for children with head circumference from 50 to 52 cm (500-520 mm). If you have a doubt between 2 measures, we recommend you to take the largest.
6+ years
The Navigator 6+ year old glasses are designed for children with head circumference from 52 to 54 cm (520-540 mm). If you have a doubt between 2 measures, we recommend you to take the largest.
