Box Helmet Size Chart

 Measuring your head to get the correct helmet size.
Using a tape measure or a piece of string, measure round your head just above the eyebrows and ears, as in the diagram, above left. Take the measurement obtained in centimetres. This is your nominal helmet size. You may wish to buy a slightly larger or smaller size depending on your personal preference e.g. if you prefer a tighter fit, buy one size smaller. Helmet linings do compress, so if your helmet is slightly tight to start with, this is quite normal. If possible, attempt to try on a helmet of the exact make and model that you require, so that you can be sure to order the correct size.