How to Choose the Perfect Bike Helmet: Fit, Shape & Safety Tips
Did you know that an ill-fitting helmet can be as ineffective as not wearing one at all? Choosing the right size is not just about comfort but also about safety. In this guide, we'll walk you through the steps to measure your head, identify your shape, and find the ideal helmet.
Why is helmet size so important?
A helmet that's too large can shift or fly off during a fall. One that's too small can cause uncomfortable pressure points or even pain. The key is finding the perfect balance between a snug fit and comfort.
1.- Know Your Head Shape
Before measuring, identify your head shape. This will help you choose a helmet whose shell fits you best.
How to Determine Your Head Shape

- Look at your head from above in a mirror or with the help of another person.
- Take a photo of the top of your head to compare with the helmet shell shape.
- Visually compare with helmets from different brands and models.
Head Shape Types:

Some brands design helmets with specific shells for each shape. Not all helmets are the same!
Step 2: Measure Your Head Circumference

Use a flexible measuring tape and place it:
- Just above your eyebrows
- Over your ears
- Around the widest part of the back of your head
Write down the measurement in centimeters.
If you don't have a measuring tape, use a string and then measure it with a ruler.
Step 3: Compare with the Size Chart

Each brand has its own chart, but here's a general guide:
Size Circumference (cm)
XS 48 – 52 cm
S 52 – 56 cm
M 56 – 58 cm
L 58 – 61 cm
XL 61 – 64 cm
If you're between sizes, choose the smaller one. The padding inside will loosen with use.
We recommend checking each brand's size chart, as some may offer intermediate sizes or have slight variations in fit.
Step 4: Fit Test
A well-fitted helmet should:
- Fit snugly without forcing it on
- Make firm contact with your head without causing pain
- Prevent you from fitting two fingers between the helmet and your head
- Move with your head, not independently
Step 5: Adjust the Strap

- The strap should form a "V" under your ears.
- It should fit snugly under your chin without being too tight.
- You should be able to fit one finger between the strap and your skin, but no more.
Step 6: Final Test

Try to remove the helmet by pulling from the back without unbuckling the strap.
- If it moves or comes off, it's too big.
- If you can't move it, you've found your ideal size!
Additional Considerations
- Weight Considerations:
- Helmets typically weigh between 3 and 4+ pounds. Models that fall between 3 and 3.75 pounds are considered lightweight. Reduced weight helps minimize neck fatigue, making long rides more comfortable. Advanced design techniques allow manufacturers to shave off ounces while adhering to strict safety standards. However, lighter helmets often come with a higher price tag due to the use of premium materials.
- Safety Certifications:
- Look for helmets that meet safety standards like DOT, ECE, or Snell. These certifications ensure the helmet has passed rigorous impact and durability tests.
- Ventilation and Comfort Features:
- Adequate airflow and moisture-wicking liners enhance comfort, especially on long rides. Adjustable vents and removable padding are additional features to consider.
- Material and Durability:
- Helmets made from carbon fiber or composite materials offer superior strength and reduced weight. Polycarbonate models are more affordable but might be heavier.
- Visibility and Noise Reduction:
- A wide field of view and anti-fog visors improve visibility. Noise-reduction technology can enhance focus and comfort during high-speed rides.
In general:
- Full-face helmets offer more protection, ideal for MTB or downhill.
- Modular helmets are versatile and comfortable for mixed routes.
- Kids' helmets have smaller shells and special padding.
- Visit specialized stores to try different brands and shapes.
Find your perfect fit — explore our premium helmet collection at Movatik and ride with confidence!
And If you have questions or need assistance choosing your helmet, feel free to contact us via chat or email us at support@movatik.com.