The small will fit little helmets like the Aussie Rider - small, med or large (it's a little helmet!)

Other helmets measuring up to 53cm - small helmet hider

Most everything else - medium helmet hider

If you have a helmet similar in style to the Charles Owen with the long back please let me know as this needs to have a little added in length.

Any questions please contact me I am happy to answer any enquiry no matter how trivial it may seem