Head circumference measurement method
Use a soft ruler to make a week around A and B. (hair is also counted)
The accuracy is measured by your own head circumference, and then you can purchase the helmet according to your needs.
![](https://ae01.alicdn.com/kf/HTB1Hwy_dkxz61VjSZFtq6yDSVXa4.jpg)
Intergrally-molded
EPS Material,Shockproof,protect head
Breathable,Sunscreen,Detachable Part
Can install light,safe riding at night
Tips:Light need buy separately,not free
Fit For 52-60CM,Free Adjustment
3 Colors can be chose
Anti-theft design,can be locked with the bike
More Details