11+ Helmet Size Guide Halfords Images. For instance, a medium helmet will typically cover when you're trying helmets on, there are a couple of tests you can do to make sure its a good fit. In this guide we look at how to ensure you get the correct one for you.
Our helmet size guides below show you how to measure your head properly, to get the best fit.
1 cm above the ears) to get the correct measurement for a helmet. Use the chart to convert measurement to hat size. 1 cm above the ears) to get the correct measurement for a helmet. Explore 69 listings for halfords bicycle helmets at best prices.