Giro Children's Dime Fs Cycling Helmet, Matt Blue, X Small 47 51 cm UK

Circumference: 47-51 cm Construction: ABS shell with EPS liner, Polyurethane bumper coating helps protect EPS liner Ventilation: 9 vents Fit System: Fit Kit padding Certification: Complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older, E.U.: CE EN1078