Size Guide Information
Size
Inches
Cms
Pediatric:
2.5 - 3.0
6 - 8
Small:
3.0 - 3.5
8 - 9
Medium:
3.5 - 4.0
9 - 10
Large:
4.0 - 4.5
10 - 11
Measure distance from chin to sternal notch with neck in neutral position.