Size Guide
  Size of band Fits head size range Optimum fit range Recommended age
Small 19" 16 - 19" 16.5 - 18.5" 1 to 3 years
Medium 20.5" 17 - 21" 18.5 - 20.5" 4 to 9 years
Large 23.5" 20.5 - 25" 20.5 - 23" 10 to adult