How should a kids bike helmet fit

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We all love to see our kids enjoying their time. However, for activities like riding a bike, it’s always necessary that you kids wear a properly fitting helmet to receive the protection they need.

This leads a lot of parents to wonder “how should a kid’s bike helmet fit?”, and in today’s guide, we’ll help you with that by walking you through everything you need to know in order to properly fit a kid’s helmet on your little angels. So without further ado, let’s jump right in!

Whether it’s a balance bike, a bike with stabilisers or a full fledged pedal bike, they need a helmet.

Why Is It Important to Have a Proper Fitting Helmet?

To answer this question, we should take a look at the design of a helmet and how they work. Helmets are usually made from a hard plastic shell and multiple layers of foam and other materials on the inside.

In the unfortunate event that a person hits his head while wearing a helmet, the shock from the impact will be dissipated and distributed throughout the entire helmet, delivering minimal impact on the person’s skull and brain.

However, for this to happen, the helmet needs to have a relatively snug fit on the head that isn’t too tight or too loose.

What Are the Risks of Wearing a Helmet That’s Too Loose or Tight?

A lot of people buy helmets without bothering to check their size during the sale. However, wearing an unsuitable helmet can actually cause a lot of problems and is considered equally dangerous as not wearing one.

Wearing a Helmet Too Tight

When the helmet is extremely tight, it exerts a lot of pressure on your child’s skull. This can cause a wide range of issues, such as headaches, blurry or double vision, head fatigue, and more.

Wearing a Helmet Too Loose

On the other hand, if the helmet is excessively loose, it can very easily fly off your child’s head or shift in position, which can lead to serious injuries in the case of an accident, defeating the purpose of wearing one.

A Step by Step Guide on How to Fit a Kids Helmet On

Now that you know the importance of wearing a properly fitting helmet, here’s a simple tutorial that shows you how to fit a helmet on your kid’s head:

Step 1: Measure Your Kid’s Head to Pick the Right Helmet

Helmets come in a variety of sizes, each of them is suitable for specific head measurements. To pick the right one, you’ll need to measure the size of your kid’s head.

This can be easily done using a tape measure around their temple (above ears) or by wrapping a string around the same spot, then measuring the string’s length. Always use the size chart provided by the helmet manufacturer to pick the right one.

Step 2: Place the Helmet Properly on Your Kid’s Head

Position the helmet properly on your kid’s head so that it covers most of the top head. The key here is to allow a distance of about two fingers above the eyebrows. 

You’ll need to repeat this test while tightening the straps to make sure that the helmet stays in place.

Step 3: Adjust the Dial Knob of the Helmet for a Proper Tension

Next, you’ll need to adjust the straps on the helmet for proper tension. First, you’ll use the back knob on the helmet to tighten the head straps to keep the helmet in place. Some helmets may have straps instead of knobs, so you have to adjust accordingly.

The goal here is to set the helmet tight enough that it won’t fall off when your kid shakes his or her head, even when the rest of the straps aren’t buckled. However, it shouldn’t be too tight that your child is uncomfortable.

Step 4: Adjust the Length of the Straps at Chin Level

Next, you’ll need to adjust the side straps so that the v-shaped part is tugged from below the ears without causing discomfort or friction with the earlobes. 

Lastly, you’ll need to buckle the straps from under the chin so that they’re not too tight. A good rule here is to be tight enough to allow one finger between the strap and the chin. 

You should also teach your kids to check the helmet every now and then using the same methods.


With that said, you now know how a kids bike helmet should fit. Ideally, the helmet needs to be adjusted so that it’s not too tight that it hurts your child’s head or too loose that it doesn’t do its job properly or falls off while playing.

In addition to helmets, make sure that your kid is wearing other essential safety gear, such as knee pads and elbow pads for full protection while riding a bike!