Sizing

For an accurate fit, head circumference is a better indicator of size than age. Measure around the head above the eyebrows and ears. 

Newborns fit: 12-14" head circumference 
3-6 months fit: 14-16" head circumference 
6-12 months fit: 16-18" head circumference 
12mos-3 yrs fit: 18-20" head circumference 
3-10 yrs fit: 20-21" head circumference 
Teen-Adults fit: 21-23" head circumference