How to Measure Your Head for a Motorcycle Helmet: A Complete Guide
Choosing the right motorcycle helmet is about more than picking a design you like. A helmet that is too loose may move around while riding, while one that is too tight can cause pressure points and discomfort. Getting the correct size is essential for a secure and comfortable fit.
If you're buying your first motorcycle helmet or replacing an old one, knowing how to measure your head correctly can make the process much easier. The good news is that you don't need any special equipment. A flexible measuring tape and a few minutes are usually all it takes.
In this guide, we'll explain how to measure your head for a motorcycle helmet, how to use a motorcycle helmet size chart, and how to check whether your new helmet fits properly.
Quick Answer: How Do You Measure Your Head for a Motorcycle Helmet?
Use a flexible measuring tape to measure the circumference of your head at its widest point, approximately 2.5 cm (1 inch) above your eyebrows and just above your ears.
- Keep the measuring tape level around your head.
- Make sure it is snug but not too tight.
- Record your measurement in centimetres.
- Repeat the measurement two or three times.
- Compare your result with the specific manufacturer's helmet size chart.
Important: Your head measurement is only a starting point. Always try on the helmet and check its fit before riding.
Why Getting the Right Motorcycle Helmet Size Matters
A properly fitted motorcycle helmet helps protect your head by staying in the correct position during an impact. However, even a helmet with the appropriate safety certification may not provide its intended protection if it doesn't fit correctly.
Here are three reasons why choosing the right size matters.
1. Better Protection
A helmet that is too large may shift or rotate during an accident, potentially exposing parts of your head. A properly fitted helmet is designed to stay securely in place.
2. Greater Riding Comfort
A helmet that is too small can create uncomfortable pressure around your forehead, temples, and cheeks. The correct size should feel snug without causing pain or excessive pressure.
3. Improved Stability
A well-fitted helmet should remain stable when you move your head. This helps reduce unwanted movement when checking mirrors, changing lanes, or riding at higher speeds.
Remember that helmet fit is just as important as choosing a helmet with an appropriate safety certification. It is also only one part of staying safe on the road. Your brakes, tyres, and other motorcycle components need regular attention too.
What You Need to Measure Your Head
Before measuring, prepare the following items:
- Flexible measuring tape: A soft tailor's measuring tape is ideal because it can follow the natural shape of your head.
- Mirror: A mirror helps you check whether the tape is positioned correctly.
- Pen and paper: Write down your measurements so you can compare them with the manufacturer's size chart.
Don't have a flexible measuring tape? You can use a piece of string instead. Wrap it around your head, mark where the ends meet, and then measure the string against a ruler.
For the most accurate result, measure your head with your hair arranged as you normally wear it underneath a helmet.
How to Measure Your Head for a Motorcycle Helmet
Follow these five steps to measure your head accurately.
Step 1: Find the Widest Part of Your Head
The most important part of measuring your head is finding its largest circumference.
Place the measuring tape approximately 2.5 cm (1 inch) above your eyebrows, just above your ears, and around the widest part of the back of your head.
This position helps capture the full circumference needed for motorcycle helmet sizing.
Step 2: Wrap the Measuring Tape Around Your Head
Bring the measuring tape around your head, keeping it level and parallel to the ground.
Make sure it passes:
- Across your forehead, above your eyebrows.
- Just above both ears.
- Around the widest part of the back of your head.
The tape should follow the natural shape of your head without twisting or slipping.
Step 3: Keep the Tape Snug but Not Tight
Pull the tape gently until it sits comfortably against your head.
Avoid pulling it too tightly, as this can produce a measurement smaller than your actual head circumference.
At the same time, don't leave extra space between the tape and your head. The goal is to measure your natural head circumference accurately.
Step 4: Record Your Measurement
Look in the mirror to check that the tape is level all the way around your head.
Read the measurement where the end of the tape meets the scale. Record it in centimetres (cm), as most motorcycle helmet size charts use centimetres.
For example, if your measurement is 58 cm, write it down before comparing it with a helmet manufacturer's sizing guide.
Step 5: Measure Again to Confirm
Repeat the process two or three times to make sure your measurement is consistent.
If you get slightly different results, reposition the tape and measure again. Use the most consistent measurement rather than relying on a single reading.
Once you have your head circumference, you're ready to check a motorcycle helmet size chart.
Motorcycle Helmet Size Chart
Most motorcycle helmet manufacturers provide a size chart based on head circumference. Although sizing can vary between brands and helmet models, the following table provides a general reference.
For example, if your head measures 58 cm, a medium helmet may be a suitable starting point. However, the actual fit will depend on the helmet's internal shape, padding, and brand-specific sizing.
A helmet labelled medium by one manufacturer may fit differently from a medium helmet made by another.
What If You're Between Two Helmet Sizes?
If your head measurement falls between two sizes, don't automatically choose the larger one.
Instead:
- Check the manufacturer's recommendations for measurements between sizes.
- Try both sizes if possible.
- Check the fit around your forehead, temples, and cheeks.
- Make sure the helmet feels secure without creating painful pressure points.
If neither size fits comfortably, consider trying another helmet model with a different internal head shape.
How to Check If Your Motorcycle Helmet Fits Properly
Measuring your head is only the first step. You should always try on a helmet before riding to confirm that it fits correctly.
Here are five important things to check.
1. Check the Overall Fit
A new motorcycle helmet should feel snug around your entire head.
The padding should make consistent contact with your head without leaving noticeable gaps. It should not feel loose or slide around when you move.
A helmet that feels comfortable because it has plenty of extra space may actually be too large.
2. Check the Forehead Area
Pay particular attention to the area around your forehead.
The helmet should sit evenly without creating excessive pressure in one particular spot.
If you experience sharp pressure, pain, or persistent discomfort, the helmet may have the wrong shape or size.
3. Check the Cheek Pads
Cheek pads should fit snugly against your cheeks.
When you move your head, the helmet should move with it rather than sliding independently. Your cheeks may feel gently compressed, especially with a new helmet.
However, the pressure should not be painful or make it difficult to close your mouth comfortably.
4. Perform a Movement Test
Fasten the chin strap securely and gently move your head from side to side and up and down.
The helmet should remain stable and move with your head.
You can also gently try to rotate the helmet while holding your head still. It should resist movement without causing painful pressure.
5. Wear It for Several Minutes
Keep the helmet on for around 10–15 minutes while checking for discomfort.
Pay attention to:
- Pressure around your temples.
- Pain across your forehead.
- Uncomfortable cheek compression.
- Uneven pressure around your head.
A helmet may feel acceptable when you first put it on but become uncomfortable after several minutes.
If discomfort develops, try a different size or model rather than assuming the padding will solve the problem.
Common Motorcycle Helmet Sizing Mistakes
Even when you measure your head correctly, a few common mistakes can lead to choosing the wrong helmet.
Choosing a Helmet Based Only on Your Usual Clothing Size
Helmet sizing is different from clothing sizing. Your head circumference is a much more useful starting point than your usual small, medium, or large clothing size.
Assuming All Brands Use the Same Size Chart
Different manufacturers use different internal shapes and sizing systems. Always check the specific model's size guide.
Choosing a Larger Helmet for Extra Comfort
A helmet should feel snug when new. Choosing one that is too loose can compromise its stability and intended protective performance.
Ignoring Head Shape
Two people can have identical head circumferences but completely different head shapes. Some helmets are designed for more oval-shaped heads, while others suit rounder head shapes.
Not Checking the Chin Strap
A correctly sized helmet still needs a properly fastened retention system. Follow the manufacturer's instructions to adjust the chin strap securely before riding.
Motorcycle Safety Beyond Helmet Sizing
Choosing the right helmet is an important part of motorcycle safety, but it shouldn't be your only consideration. Before heading out, take time to check other essential components of your bike.
For example, properly functioning brakes are essential for maintaining control. If you want to learn more about basic maintenance, read our guide on how to bleed motorcycle brakes.
Tyre condition also affects grip, handling, and braking performance. Our article on how long motorcycle tyres last explains what affects tyre lifespan and when you should consider replacing them.
If you're planning a longer journey, it's worth reviewing your motorcycle's condition before setting off. Our guide to preparing for a motorcycle road trip covers important checks and preparation tips.
Regular maintenance is equally important. Keeping your chain clean helps reduce dirt build-up and supports smoother operation. Find out more in our guide on how to clean a motorcycle chain.
Frequently Asked Questions
How tight should a motorcycle helmet be?
A motorcycle helmet should fit snugly and evenly around your head. The cheek pads should make firm contact with your cheeks, and the helmet should not move excessively when you turn your head.
However, it should not create painful pressure points or cause persistent discomfort.
Can I measure my head without a measuring tape?
Yes. You can use a piece of string or non-stretchy ribbon.
Wrap it around the widest part of your head, approximately 2.5 cm above your eyebrows and ears. Mark where the ends meet, then lay the string flat against a ruler to measure its length.
Are motorcycle helmet sizes the same across brands?
No. Motorcycle helmet sizing can vary between manufacturers and even between different models from the same brand.
Always compare your head circumference with the specific manufacturer's size chart rather than assuming that your usual helmet size will fit every brand.
What should I do if my motorcycle helmet feels too tight?
First, check whether the helmet is simply snug because it is new or whether it creates painful pressure.
If it causes persistent pain around your forehead, temples, or other areas, try a different size or helmet model. Don't assume that a helmet that feels uncomfortably tight will eventually become suitable.
How do I know if my motorcycle helmet is too big?
A helmet may be too big if it slides around when you move your head, has noticeable gaps around the padding, or can rotate excessively when properly fastened.
The helmet should stay securely positioned and move with your head.
Should I measure my head every time I buy a new motorcycle helmet?
It's a good idea to measure again when buying a new helmet, especially if you are switching brands or models.
Even if you already know your previous helmet size, your new helmet may have a different internal shape or sizing system.
Final Thoughts
Knowing how to measure your head for a motorcycle helmet is an important first step towards choosing the right protective gear.
Use a flexible measuring tape, measure around the widest part of your head, and repeat the process to confirm your results. Then compare your measurement with the manufacturer's size chart and check the helmet's actual fit before riding.
Remember, the best motorcycle helmet isn't simply the one with the right number on the label. It is the one that fits your head securely, comfortably, and correctly while meeting the appropriate safety standards.
Take a few extra minutes to measure and check the fit. It can make a meaningful difference to your riding comfort and safety.
