SIZE GUIDE - BOB AND BONNET

Measure your head circumference for your bike helmet size

It is only available in one size.

A: Head circumference in cm Size
56 One size fits all

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⚠️ For the MAX balaclava hat: Being made of mesh, the hats are more flexible and can fit up to 58 cm head circumference.

Our advice: To measure your head circumference, you must, using a tape measure, go around your skull as shown in the diagram, passing through the forehead and the back of the head. If you do not have a tape measure, go around it with a string and transfer the length to a standard tape measure.