Helmet Sizing Chart

Average Head Circumference by Age

 AGE Head Size - Girl (cm) Head Size - Boy (cm)
1 year  45 46
2 years 47 48
3 years 49 49
4 years  49.5 50.5
5 years 50 51
6 years 51 52
7 years 52 53
8 years 53 54