Wearing a properly fitting motorcycle helmet is crucial for rider safety. This comprehensive guide provides an ultimate size chart for motorcycle helmets, including top brands like Shoei, AGV, Bell, Arai, HJC, Schuberth, Shark, and more. Understanding the right size for your head shape and finding the perfect fit will enhance both safety and comfort during your rides.

Por Tip for Odd Shape: I recommended one of my fellow riders, who has an irregular head shape, to consider getting a road helmet. Road helmets are designed with a focus on comfort, fit, and versatility, making them suitable for a wide range of head shapes. By opting for a road helmet, my fellow rider can benefit from features like adjustable fit systems, different padding options, and ample ventilation, which can help accommodate their unique head shape while providing optimal comfort and protection during rides.
Understanding Helmet Sizes
Before exploring specific size charts, it’s important to understand the different measurement systems used for helmet sizes. Motorcycle helmets often come in metric (centimeters) and imperial (inches) sizes. Additionally, head shape plays a significant role in helmet fit, as different brands cater to various head shapes, such as round, intermediate oval, and long oval.
Helmet Sizing Charts for Top Brands
1. Shoei Helmet Size Chart
Size | Hat Size | CM | Inches |
---|---|---|---|
XXS | 6 3/8 – 6 1/2 | 51 – 52 | 20 – 20 1/2 |
XS | 6 5/8 – 6 3/4 | 53 – 54 | 20 7/8 – 21 1/4 |
S | 6 7/8 – 7 | 55 – 56 | 21 5/8 – 22 |
M | 7 1/8 – 7 1/4 | 57 – 58 | 22 1/2 – 22 7/8 |
L | 7 3/8 – 7 1/2 | 59 – 60 | 23 1/4 – 23 5/8 |
XL | 7 5/8 – 7 3/4 | 61 – 62 | 24 – 24 3/8 |
XXL | 7 7/8 – 8 | 63 – 64 | 24 3/4 – 25 1/4 |
XXXL | 8 1/8 – 8 1/4 | 65 – 66 | 25 5/8 – 26 |
Please note that this size chart is specific to Shoei helmets and the head circumference measurements are in centimeters. Make sure to measure your head circumference accurately to determine the appropriate size for your Shoei helmet.
2. AGV Helmet Size Chart
Size | Hat Size | CM | Inches |
---|---|---|---|
XS | 6 5/8 – 6 3/4 | 53 – 54 | 20 7/8 – 21 1/4 |
S | 6 7/8 – 7 | 55 – 56 | 21 5/8 – 22 |
MS | 7 1/8 – 7 1/4 | 57 – 58 | 22 1/2 – 22 7/8 |
ML | 7 3/8 – 7 1/2 | 59 – 60 | 23 1/4 – 23 5/8 |
L | 7 5/8 – 7 3/4 | 61 – 62 | 24 – 24 3/8 |
XL | 7 7/8 – 8 | 63 – 64 | 24 3/4 – 25 1/4 |
XXL | 8 1/8 – 8 1/4 | 65 – 66 | 25 5/8 – 26 |
Please note that this size chart is specific to AGV helmets, and the head circumference measurements are in centimeters. Make sure to measure your head circumference accurately to determine the appropriate size for your AGV helmet.
3. Bell Helmet Size Chart
Size | Hat Size | CM | Inches |
---|---|---|---|
XS | 6 5/8 – 6 3/4 | 53 – 54 | 20 7/8 – 21 1/4 |
S | 6 7/8 – 7 | 55 – 56 | 21 5/8 – 22 |
M | 7 1/8 – 7 1/4 | 57 – 58 | 22 1/2 – 22 7/8 |
L | 7 3/8 – 7 1/2 | 59 – 60 | 23 1/4 – 23 5/8 |
XL | 7 5/8 – 7 3/4 | 61 – 62 | 24 – 24 3/8 |
XXL | 7 7/8 – 8 | 63 – 64 | 24 3/4 – 25 1/4 |
XXXL | 8 1/8 – 8 1/4 | 65 – 66 | 25 5/8 – 26 |
Please note that this size chart is specific to Bell helmets, and the head circumference measurements are in centimeters. Make sure to measure your head circumference accurately to determine the appropriate size for your Bell helmet.
4. Arai Helmet Size Chart
Size | Hat Size | CM | Inches |
---|---|---|---|
XXS | 6 3/8 – 6 1/2 | 51 – 52 | 20 – 20 1/2 |
XS | 6 5/8 – 6 3/4 | 53 – 54 | 20 7/8 – 21 1/4 |
S | 6 7/8 – 7 | 55 – 56 | 21 5/8 – 22 |
M | 7 1/8 – 7 1/4 | 57 – 58 | 22 1/2 – 22 7/8 |
L | 7 3/8 – 7 1/2 | 59 – 60 | 23 1/4 – 23 5/8 |
XL | 7 5/8 – 7 3/4 | 61 – 62 | 24 – 24 3/8 |
XXL | 7 7/8 – 8 | 63 – 64 | 24 3/4 – 25 1/4 |
Please note that this size chart is specific to Arai helmets, and the head circumference measurements are in centimeters. Ensure accurate measurement of your head circumference to determine the appropriate size for your Arai helmet.
5. HJC Helmet Size Chart
Size | Hat Size | CM | Inches |
---|---|---|---|
XS | 6 5/8 – 6 3/4 | 53 – 54 | 20 7/8 – 21 1/4 |
S | 6 7/8 – 7 | 55 – 56 | 21 5/8 – 22 |
M | 7 1/8 – 7 1/4 | 57 – 58 | 22 1/2 – 22 7/8 |
L | 7 3/8 – 7 1/2 | 59 – 60 | 23 1/4 – 23 5/8 |
XL | 7 5/8 – 7 3/4 | 61 – 62 | 24 – 24 3/8 |
XXL | 7 7/8 – 8 | 63 – 64 | 24 3/4 – 25 1/4 |
XXXL | 8 1/8 – 8 1/4 | 65 – 66 | 25 5/8 – 26 |
Please note that this size chart is specific to HJC helmets, and the head circumference measurements are in centimeters. Make sure to accurately measure your head circumference to determine the appropriate size for your HJC helmet.
6. Schuberth Helmet Size Chart
Size | Hat Size | CM | Inches |
---|---|---|---|
XS | 6 3/4 – 6 7/8 | 54 – 55 | 21 1/4 – 21 5/8 |
S | 7 – 7 1/8 | 56 – 57 | 22 – 22 1/2 |
M | 7 1/4 – 7 3/8 | 58 – 59 | 22 7/8 – 23 1/4 |
L | 7 1/2 – 7 5/8 | 60 – 61 | 23 5/8 – 24 |
XL | 7 3/4 – 7 7/8 | 62 – 63 | 24 3/8 – 24 3/4 |
XXL | 8 – 8 1/8 | 64 – 65 | 25 1/4 – 25 5/8 |
Please note that this size chart is specific to Schuberth helmets, and the head circumference measurements are in centimeters. It is important to measure your head circumference accurately to determine the appropriate size for your Schuberth helmet.
7. Shark Helmet Size Chart
Size | Hat Size | CM | Inches |
---|---|---|---|
XS | 6 3/4 – 6 7/8 | 54 – 55 | 21 1/4 – 21 5/8 |
S | 6 7/8 – 7 | 55 – 56 | 21 5/8 – 22 |
M | 7 1/8 – 7 1/4 | 57 – 58 | 22 1/2 – 22 7/8 |
L | 7 3/8 – 7 1/2 | 59 – 60 | 23 1/4 – 23 5/8 |
XL | 7 5/8 – 7 3/4 | 61 – 62 | 24 – 24 3/8 |
XXL | 7 7/8 – 8 | 63 – 64 | 24 3/4 – 25 1/4 |
Please note that this size chart is specific to Shark helmets, and the head circumference measurements are in centimeters. Be sure to measure your head circumference accurately to determine the appropriate size for your Shark helmet.
A well-fitted helmet creates a secure seal around your head, reducing the chances of wind turbulence and external noise infiltrating the interior. By wearing a helmet that fits snugly, you can enjoy a quieter and more enjoyable riding experience, allowing you to focus on the road ahead and enhancing your overall safety and comfort on the motorcycle.
Tips for Finding the Right Helmet Size
Choosing the correct helmet size is essential for safety and comfort. Here are some tips to help you find the right fit:

a) Measurement Techniques
- Measure the circumference of your head using a flexible tape measure.
- Follow the manufacturer’s instructions for measuring and selecting the appropriate size.
b) Trying on Helmets In-Store
- Visit a local motorcycle gear store to try on helmets in person.
- Ensure the helmet fits snugly without causing any discomfort or pressure points.
c) Online Purchase Considerations
- If purchasing online, refer to the brand’s size chart and compare your measurements.
- Read customer reviews to understand how the helmet fits in real-world scenarios.
d) Helmet Fit Adjustments
- Most helmets come with removable padding and adjustable straps.
- Fine-tune the fit by adjusting these features to achieve a secure and comfortable feel.
Common Mistakes to Avoid
To ensure you make the right choice when selecting a motorcycle helmet size, avoid these common mistakes:
a) Choosing a Helmet That Is Too Loose or Tight
- A loose helmet may not provide adequate protection in case of an accident.
- A tight helmet can cause discomfort and affect circulation.
b) Neglecting Head Shape Compatibility
- Consider your head shape when selecting a brand and model.
- Different brands cater to different head shapes for optimal fit and comfort.
c) Ignoring Safety Certifications
- Always choose helmets with appropriate safety certifications such as DOT, ECE, or Snell.
- Certified helmets undergo rigorous testing to ensure they meet safety standards.

Frequently Asked Questions (FAQs)
Q: How do I measure my head for a motorcycle helmet?
A: Use a flexible tape measure and wrap it around the largest part of your head, typically just above your eyebrows.
Q: Can I use a size chart from one brand to choose a helmet from another brand?
A: It’s recommended to use the size chart provided by the specific brand you are interested in, as helmet sizes can vary between brands.
Q: What if my head measurement falls between two sizes on the chart?
A: It’s generally advised to choose the smaller size as helmets tend to break in and mold to your head shape over time.
Conclusion
Selecting the right size motorcycle helmet is essential for ensuring your safety on the road. With the comprehensive size chart and guidelines provided in this guide, you can confidently choose a helmet that fits perfectly, offering both comfort and protection. Prioritize safety by understanding your head size, following brand-specific charts, and avoiding common mistakes when selecting a motorcycle helmet. Ride safe and enjoy the open road!