To get the right size helmet you must measure. To do this place a tape measure around the head 1cm above the eyebrows and make sure the tape is level all the way around the head. Take the measurement in centimetres. If you don’t have a tape measure use string or wool then lie this along a ruler.
You are looking at the Youth Traffic Riding Helmet – Giro Tremor with Rear Vent Light. If this is not the correct sized option then match your measurement to the other helmet solutions.