Choosing the right size is one of the most important parts of buying a motorcycle helmet. Use the guide below to measure your head and compare your measurement with the appropriate Hedon size chart.
Measure around the widest part of your head, approximately 2cm above your eyebrows, passing just above your ears and around the back of your head.
Use a soft tape measure and record the measurement in centimetres.

If you're between sizes or unsure which helmet is right for you, we're always happy to help.
Your head shape can affect how a helmet fits, even when the circumference measurement is correct.
Hedon helmet models suit slightly different head shapes, so use the illustration below alongside the individual size charts.

Best suited to riders with a slightly longer, oval head shape.
| Size | Head Circumference |
|---|---|
| S | 54–55 cm |
| M | 56–57 cm |
| L | 58–59 cm |
| XL | 60–61 cm |
| XXL | 62 cm |
| XXXL | 63–64 cm |
Adventure touring helmet sizing for the Hedon Psilo Explorer range.
| Size | Head Circumference |
|---|---|
| S | 53–54 cm |
| M | 55–56 cm |
| L | 57–58 cm |
| XL | 59–60 cm |
| XXL | 61–62 cm |
| XXXL | 63–64 cm |
Best suited to riders with a slightly rounder head shape.
| Size | Head Circumference |
|---|---|
| XS | 52–53 cm |
| S | 54–55 cm |
| M | 56–57 cm |
| L | 58–59 cm |
| XL | 60–61 cm |
| XXL | 62 cm |
Pop into our Guildford store and we'll help you find the Hedon helmet that suits your head shape, check the fit, explain the differences between the models, and make sure you leave with a helmet that's comfortable, secure and gives you confidence every time you ride.
Whether you're buying your first premium helmet or replacing an old favourite, we're always happy to offer honest, rider-to-rider advice.
Independent Motorcycle Shop • Official Hedon Retailer • Helmet Fitting • Guildford, Surrey
The Hedon Hedonist Polvo is a retro open-face motorcycle helmet inspired by weathered leather, dusty landscapes and the timeless character of natural materials. Its rich Marrakech Brown and Champagne gradient finish reflects the warmth and depth of a well-travelled adventure, combining classic styling with the craftsmanship Hedon is known for.
The Hedonist is designed for riders who love the freedom and visibility of an open-face helmet without compromising on quality. Handmade in London, it combines a lightweight composite shell, luxurious brown leather trim and a low-profile fit for exceptional comfort on every ride. Whether you're commuting, exploring country roads or heading out for a weekend ride, the Polvo delivers understated style with premium craftsmanship throughout.
Approximate Weight
A lightweight open-face helmet with timeless styling, premium craftsmanship and a versatile finish that looks great with almost any bike.
Need to exchange for a different size or send something back? Our online Returns Portal makes the process quick and straightforward.
Need advice choosing the right gear, checking compatibility or finding the right size? Visit our Help Centre for answers to common questions, or get in touch if you’d prefer to speak to us.