Helmet Size Chart for Kids: A Parent’s Guide
Finding the right helmet for your child can be confusing. As a parent, you want to make sure your kid stays safe while riding a bike, scooter, or skateboard. But if the helmet is too big, it can slide off. If it’s too small, it may hurt and your child won’t want to wear it. This guide will help you understand helmet sizes for kids and how to pick the perfect one for your child.
Why Helmet Size Matters
A helmet that fits well offers the best protection. If it’s loose, it won’t stay in place during a fall. If it’s too tight, your child might take it off while riding. A properly fitted helmet covers the forehead, sits level on the head, and doesn’t move when your child shakes their head. Getting the right size is just as important as wearing the helmet itself.
Understanding Helmet Sizes
Helmet sizes for kids usually come in general terms like Toddler, Small, or Medium, but each brand may use different measurements. That’s why it’s better to go by your child’s head circumference—the measurement around their head in centimeters (cm) or inches (in).
Most helmet sizes are labeled as:
- Toddler: 18 to 20 inches (46–51 cm)
- Small: 20 to 21.5 inches (51–55 cm)
- Medium: 21.5 to 23 inches (55–58 cm)
Always check the size chart of the brand you are buying from, as some may vary slightly.
How to Measure Your Child’s Head
To measure your child’s head, all you need is a soft measuring tape. If you don’t have one, use a string and a ruler.
Here’s how to do it:
- Wrap the tape around your child’s head, just above the eyebrows and ears.
- Make sure the tape is level all the way around.
- Note the measurement in inches or centimeters.
It’s better to take the measurement a few times to make sure it’s correct. Once you have it, you can match it to the helmet size chart.
Getting the Right Fit
Once you pick the correct size based on the chart, let your child try on the helmet. It should feel snug but not tight. When you gently move the helmet, their head should move with it. It shouldn’t tilt backward or forward.
The chin strap should also be adjusted. It must be tight enough that only one or two fingers can fit between the strap and your child’s chin. The side straps should form a “V” just under the ears.
If the helmet comes with extra padding or a dial-fit system, use them to make the fit better. These features help the helmet grow with your child.
When to Upgrade the Helmet
Kids grow fast. Even if a helmet fits today, it might not fit in six months. Check the fit regularly, especially after a growth spurt. If the helmet leaves red marks or your child says it feels tight, it’s time for a new one.
Also, if the helmet is dropped hard or gets cracked, replace it. Even if it looks okay, the inside may be damaged and won’t protect your child during a fall.
Tips to Help Kids Wear Helmets
Even if the helmet fits well, your child may not want to wear it. Here are a few simple tips to help:
- Let them choose a color or design they like.
- Wear your helmet too if you’re riding together.
- Start early so it becomes a habit.
- Praise or reward them for wearing it.
If the helmet is comfortable and looks fun, your child will be more likely to keep it on.
Don’t Trust Age Labels Alone
Some helmets are sold with age labels like “for ages 3–5” or “ages 5–8.” These can help as a guide, but they aren’t always correct. Every child’s head size is different. One 4-year-old might need a toddler size, while another might need a medium. That’s why measuring is better than guessing based on age.
Sample Helmet Size Chart (Based on Head Circumference)
| Helmet Label | Head Size in Inches | Head Size in Centimeters |
| Toddler | 18 – 20 in | 46 – 51 cm |
| Small | 20 – 21.5 in | 51 – 55 cm |
| Medium | 21.5 – 23 in | 55 – 58 cm |
Always refer to the brand-specific chart when buying a helmet online or in a store.
Final Thoughts
Your child’s safety starts with the right helmet. A good fit gives them better protection and makes them more likely to wear it every time they ride. Measure their head, pick the right size, adjust it carefully, and replace it when needed. Don’t rush the process—your child’s head is worth the extra effort.
About Street Jam
At Street Jam, we care about your child’s safety and style. Our helmets are designed to fit perfectly, look cool, and feel comfortable. Whether your little rider is just starting out or zooming around the neighborhood, Street Jam helmets are built for fun and protection. Choose smart. Ride safe. Ride Street Jam.
