Our helmet size guides below show you how to measure your head properly, to get the best fit.
Top tips: Ask a friend to help – it tends to improve accuracy. Keep the tape measure snug but not tight.
Measure around the centre of your forehead just above your ears, crossing the bumpy bone at the back of your head (occipital bone).
Remember, all sizing information is a guide only. If you have any questions about bike sizing, our expert team is here to help. Call us on 0330 555 0080, use our Live Chat, or email us.