Finding Your Perfect Helmet Fit: A Complete Guide

A poorly fitting helmet isn't just uncomfortable – it's dangerous. Your helmet must fit perfectly, with no pressure points, but also with no excessive movement. We regularly see riders wearing the wrong size, which is unfortunate because it only takes a few minutes to get it right. Let us walk you through the process step by step.

Why the right helmet size matters so much

Your helmet is your only protection in case of an accident. A helmet that shifts, sags, or pinches doesn't just offer less protection – it's also distracting while riding. In a fall, a loose helmet can fly right off your head, which is exactly what you don't want.

A well-fitting helmet feels like a second skin after ten minutes of wearing it. If you still feel pressure points after ten minutes, the helmet doesn't fit properly. Our retro helmets from brands like DMD Retro and Bell are designed with careful attention to fit, but you need to get the right size.

Step 1: Measure your head correctly

This is the foundation. A size chart is useless if you measure your head incorrectly.

Take a soft measuring tape (the kind used for sewing). Place the tape around the widest part of your head, approximately one centimeter above your eyebrows. The tape should sit horizontally and snugly, but not so tight that it cuts into your skin.

Note the measurement in centimeters. This is your base circumference. Make sure you measure this two or three times – small differences can have big consequences when measuring motorcycle helmet size.

Step 2: Determine your head shape

This is crucial and often overlooked. Every head is different: some are round, others oval or elongated.

Look in the mirror. Is your face round and your forehead broad? Then you probably have a round head. Do you have a longer face and more oval forehead? Then an oval cut will fit better.

Most helmets have three fit categories:

• Round - Broad foreheads, larger sides
• Oval - Longer face, narrower sides
• Intermediate - Somewhere in between

This information is just as important as the centimeters. A helmet that measures 57 centimeters but doesn't have the right head shape will never fit properly.

Step 3: Check the size by hand

Before you adjust a helmet with all the padding removed, check the basics with your hands first.

Place the helmet on your head without fastening the chinstrap. Try gently rotating it. Your head shouldn't move – if the helmet rotates easily, it's too big. You also shouldn't feel like your ears are being pulled through – that means it's too small.

This is a quick check that immediately tells you if you're in the right ballpark. With DMD Retro helmets and Bell models, this is often the first indication of whether you're on the right track.

Step 4: Adjust the chinstrap

Now for the chinstrap. This is essential for proper fit.

The chinstrap should sit under your chin with roughly one finger's width of space between the strap and your chin – you should be able to slip your finger in, but not more than that. This is the "two-finger rule" you see everywhere, and it just works.

Tighten the strap. Your helmet shouldn't move at all now when you move your head. Test this by gently tilting your head back and forth. No movement? Perfect.

Step 5: Let it sit for 15-30 minutes

This is the real moment of truth. A helmet can feel fine for the first few minutes, but after ten minutes you start noticing pressure points that won't go away.

Put it on and settle into a chair or on your bike. Let it sit for at least 15 minutes. Check for any painful spots developing. The same goes for a retro helmet for cafe racer riders: comfort isn't a luxury, it's necessary.

If after 15 minutes everything feels comfortable and you don't see any red marks on your forehead, you've got a good fit.

Size charts by brand

Here are the most commonly used size conversions for our helmet brands. Each manufacturer uses slightly different standards.

DMD Retro

DMD makes classic retro helmets with a distinctive style. They measure relatively generously – many riders choose a size smaller than expected.

DMD helmets typically have more space around the temples and work well for round head shapes. Note: they sit snug at the front – this is normal and improves with break-in.

Bell

Bell is an American classic with excellent fit. They make something for everyone: from the Bell Bullitt to more modern variants. Bell helmets typically offer three head shape options:

Head Shape: Bell makes RoundOval, IntermediateOval, and LongOval options. Check which you need. Many cafe racer riders choose intermediate because it's the most neutral fit.

Roeg

Roeg makes vintage-inspired helmets with a modern twist. Their fit is slightly narrower than DMD, with more focus on oval head shapes.

Roeg helmets have a bit more volume at the back. They're good for people with longer hair – there's more room.

Holy Freedom Stealth

Holy Freedom makes relatively compact helmets with lots of character. The Stealth is their retro line and fits tighter than average.

Holy Freedom helmets have a somewhat narrower cut – perfect if you have a round head and want something more compact. Note: these helmets generally sit on the tight side.

Frequently asked questions

Can I buy a helmet online without trying it first?

Yes, but make sure you know your exact size and understand the return policy. We provide plenty of motorcycle helmet sizing guides, but nothing replaces trying in person. Our shop in Haarlem is open if you want to stop by – you can try all the models in person.

My helmet is tight – will it break in?

Yes and no. Many helmets open up slightly after 5-10 hours of wear, especially as the inner lining compresses. But pressure points won't go away. A helmet can be snug, but not painful.

Does the fit really differ between brands?

Absolutely. DMD feels different from Bell. Holy Freedom is more compact than Roeg. This is why those size charts exist. An S in one brand can be an M in another.

What if I'm between two sizes?

Always choose the smaller size. You can always add extra padding to a helmet, but you can't make a helmet smaller. If in doubt: stop by our shop in Haarlem and try both.

My helmet feels good, but it slips at the back. What now?

This suggests a head shape issue, not a sizing problem. You probably need a different head shape. Check the head shape options for your brand – especially Bell and Roeg offer different variants.

Our personal tips for choosing

If you're torn between two brands: DMD Retro helmets sit slightly roomier, Holy Freedom Stealth slightly more compact. Bell sits somewhere in the middle, as does Roeg – but each brand feels different.

For cafe racer builds, riders often choose Bell Bullitt or DMD Classic because they have the right vintage feel without compromising safety. Holy Freedom Stealth is also phenomenally popular in the scene.

Remember: your helmet must also suit your face. A narrow face in a wide helmet feels odd. This isn't something you can "train" yourself into later.

Conclusion

Measuring your motorcycle helmet size correctly isn't rocket science, but it does require attention. Take your time, measure two or three times, pay attention to your head shape, and let your helmet sit for at least 15 minutes before making a decision.

You deserve a helmet that fits perfectly. Whether you go for a classic DMD Retro, a timeless Bell, the vintage vibes of Roeg, or the character of Holy Freedom Stealth – make sure you have the right size.

Stop by our shop in Haarlem if you can try them in person. Not in the area? No problem – get in touch and we'll walk you through the process by phone. We want you riding in a helmet that fits perfectly, not just for the next ten kilometers, but for years to come.