Example:

If a user inputs 20.5 inches as their head circumference, the result would display:

• Helmet Size: M
• Head Circumference: 20.5 inches

Helmet Size Chart (for various types of helmets)

A Helmet Size Chart is essential for ensuring a proper fit when selecting a helmet for various activities, whether it’s for biking, motorcycling, skateboarding, or sports like football or skiing. A properly fitting helmet is crucial for safety and comfort. Below is a detailed explanation and interactive tool suggestion for selecting the correct helmet size based on head circumference.

1. General Helmet Size Chart for Biking, Motorcycling, Skateboarding, and Sports Helmets:

Head Circumference (inches)	Head Circumference (cm)	Helmet Size
18 ½ - 19 ¼	47 - 49	XS
19 ¼ - 20	49 - 51	S
20 - 20 ¾	51 - 53	M
20 ¾ - 21 ½	53 - 55	L
21 ½ - 22	55 - 57	XL
22 - 22 ¾	57 - 59	XXL
22 ¾ - 23 ½	59 - 60	XXXL

How to Measure Your Head for Helmet Size:

1. Use a Flexible Measuring Tape:
   • Take a soft measuring tape (like the one used for sewing) and measure around the circumference of your head.
   • Place the tape about 1 inch above your eyebrows, wrapping it all the way around your head, going over the most prominent part of the back of your head.
2. Record the Measurement:
   • After you measure your head, ensure the tape is snug but not tight. It should be a comfortable fit.
   • Check the measurement and compare it to the chart above to determine your helmet size.
3. Fit Check:
   • Once you select a helmet size, try it on. It should feel snug but not uncomfortable.
   • A well-fitting helmet should not move around or shift when you shake your head. It should sit level on your head, with the front of the helmet just above your eyebrows.

Specialized Helmets:

Some helmets, such as motorcycle helmets, skate helmets, football helmets, or skiing/snowboarding helmets, may have specific size charts, but the measurement process remains similar. Always check the manufacturer’s sizing chart for the best fit.