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Step 1
Decide what type of helmet that you'll need, an adult or youth. The two look the same, but the materials from which they are constructed are not the same. Cost effective materials, such as durable plastics, make up youth helmets, whereas the adult helmet is made of a more flexible material known as Lexan Polycarbonate.
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Step 2
Determine your helmet size. If you have a rather large head and you try to jam it into a helmet that's not big enough, you're going to have problems, especially when you take it off. If the helmet dwarfs your head, when a linebacker plows you to the ground like an entire wrecking crew, causing your head to rattle around in your helmet, you might get a headache. Even worse, your helmet could pop off, your head could hit the ground, bounce once, and hit the ground again. You can see that it's important to choose wisely. Measure the circumference of your head with a measuring tape an inch above your eyebrows.
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Step 3
Take the caliper measurement. With the helmet on, place the caliper, a measuring device, at the front of the head, one inch above the eyebrow to the back at the largest part of the head. Check to ensure that the frontal rim is one inch above the eyebrows.
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Step 4
Make sure the chin strap is fitted firmly, not tightly, into place.
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Step 5
Adjust the helmet's air system. If the helmet has this system, increase or decrease the amount of air to gain a snug fit.
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Step 6
Fit the helmet snugly. Try to move it from side to side and up and down. It shouldn't slip.
