How to Measure for Bike Helmets

Prudent bicyclists wear helmets every time they ride. In fact, many areas require helmets, especially for children. Though some people (especially young people) may not like the idea of a bicycle helmet, the possibility of a serious head injury or death resulting from an accident may motivate cyclists to wear them. A helmet that fits properly may reduce head injury risk by up to 85 percent and brain injury risk by up to 88 percent, according to the National Highway Traffic Safety Administration (NHTSA).

Things You'll Need

• Tape measure
• Paper
• Pencil

Instructions

Measuring the Rider's Head

1. Position the end of the tape measure immediately above one eyebrow.

2. Pull the tape measure around the head, keeping the tape measure level as it encircles the head completely back to the starting point.

3. Adjust the tape measure so it is snug against the head but not overly tight.

4. Note the measurement on the tape measure where the tape measure meets the starting end of the tape measure.

5. Write the head circumference measurement down on the paper.

Selecting the Helmet

1. Use the circumference measurement to select a helmet in the proper size. Consult the label of the helmet to ensure the head circumference falls between the minimum and maximum circumference measurements for the helmet.

2. Always try on a helmet and make sure you can adjust it for a proper and comfortable fit prior to purchasing it. A bicycle helmet must be snug around all points of the head and must cover the top of the forehead for adequate protection.

3. Adjust the chin straps so the connecting point (where the front and back straps meet) sits just below the ears.

Tips & Warnings

• Use sizing pads to get the best fit possible. For children, you can remove the pads as their heads grow.

References

• NHTSA: Easy Steps to Properly Fit a Bicycle Helmet
• Bicycle Helmet Safety Institute: Bicycle Helmet Sizing

Resources

• Helmet Sizing Chart
• Helmet Laws for Bicycle Riders