Bell Motorcycle Helmet Size Chart | Measure Once, Fit Better

Bell moto lids usually size by head circumference, with XS at 53–54 cm and XXXL at 64–66 cm.

Buying a Bell helmet gets easier when you start with one number: your head circumference. Bell’s general motorcycle chart runs from XS to XXXL, which gives you a solid first pick before you check the sizing on the exact helmet you want. That last step matters, since Bell says some models use their own product-page chart.

If you want a clean way to choose your size, grab a soft tape, wrap it around your head about an inch above your eyebrows, and keep it level from front to back. Write the number down in centimeters first. Then match it to the chart below and do a proper fit check once the helmet is on.

How To Measure Your Head For A Bell Helmet

A soft tailor’s tape works best, though a string and ruler will do the job too. Wrap the tape around the widest part of your head, just above the brows and ears, and keep the line flat all the way around. Take the measurement two or three times. If you get two close numbers, use the larger one.

Start with centimeters, since Bell lists metric sizing first and it makes the chart easier to match. Don’t yank the tape tight enough to squeeze your skin. You want the number that matches your natural head size, not a smaller one created by pulling the tape too hard.

What A Fresh Helmet Should Feel Like

A new Bell helmet should feel snug all around. It should not float on your head, and it should not create one sharp pressure point that makes you want it off after a couple of minutes. When you gently rotate the helmet side to side, your skin should move with the liner. If the shell slides while your head stays still, the helmet is too loose.

Cheek pressure is normal on a new full-face or motocross lid. What you do not want is cheek pad pressure so heavy that you bite the inside of your mouth, or a chin strap loose enough to let the helmet shift when you tug up from the rear. A firm, planted fit is what you’re after.

When Your Number Sits Between Sizes

If your measurement lands right on a size break, don’t rush to the larger shell. Helmet liners settle a bit with wear, so a brand-new fit that feels firm often works out better than one that already feels roomy on day one. Loose helmets rarely get better after break-in.

There is one catch. If the helmet feels painfully tight in one narrow area, that points to a shape mismatch more than a straight size problem. Going up a size can fix the hot spot, yet leave the helmet loose everywhere else. In that case, a different Bell model may suit you better than a bigger shell.

Bell Motorcycle Helmet Size Chart By Head Measurement

Bell’s size charts page lists this general motorcycle and dirt bike sizing range, and Bell also says the exact product page should be your final check before you buy.

Bell Size	Head Circumference (cm)	Head Circumference (in)
XS	53–54	20 7/8–21 1/4
S	54–56	21 1/4–22
M	56–58	22–22 7/8
L	58–60	22 7/8–23 5/8
XL	60–62	23 5/8–24 3/8
XXL	62–64	24 3/8–25 1/4
XXXL	64–66	25 1/4–26

This chart gives you a strong starting point for most Bell street and dirt helmets. It is handy when you’re buying online, replacing an old lid, or switching from another brand with a different size run. Still, Bell’s own note on the chart page is worth following: always compare your number with the size info shown on the product page for the helmet you plan to wear.

That extra check can save a return. Some Bell models have slightly different breakpoints, and some offer liner or cheek-pad swaps that fine-tune the fit after you’ve chosen the right shell size.

How Bell Sizes Usually Play Out On Your Head

Riders at the lower end of a size range often get the cleanest fit from that listed size, since the liner still has room to bed in. A 56 cm rider, say, may fit both the top end of Small and the lower end of Medium on paper, yet the better call will often depend on how the shell grabs the crown and cheeks once the helmet is fully on.

Medium and Large are where plenty of riders get tripped up. A helmet that slips on with no effort can feel nice in the living room and then start lifting, rocking, or humming once the wind hits it. A Bell should feel secure from the start. You should notice even contact across the whole head, not just at the forehead or the back.

At the bigger end of the chart, XL through XXXL riders should pay close attention to strap length, cheek pressure, and how low the helmet sits on the brow. If the shell perches high, the size may be off or the internal shape may not match your head as well as another Bell model.

That’s why the size label alone never tells the whole story. Two riders can share the same measurement and still prefer different Bell helmets once real fit comes into play. The chart gets you to the right door. The wear test tells you whether to walk through it.

Fit Checks To Do Before Your First Ride

Bell’s how to fit your motorcycle helmet article says to measure about an inch above the eyebrows, keep the helmet low on the forehead, and aim for snug cheek pads and a snug chin strap. Those points make a good at-home fit check.

What You Feel	What It Usually Means	Next Move
Helmet slides when you shake your head	The shell is too loose	Try one size down
Firm, even pressure all around	The size is close	Wear it indoors for 20–30 minutes
Sharp pain at one spot	The shape may be wrong	Try another Bell model
Cheeks feel lightly compressed	Fresh cheek pads are doing their job	Recheck after break-in
You can pull the strap over your chin	The strap is too loose	Adjust until it sits snug
Helmet blocks part of your view	It may be sitting wrong	Reposition and recheck size

Simple Wear Test At Home

Once the helmet is on, keep it indoors for at least 20 minutes. Don’t just stand there. Turn your head, look up and down, and mimic the movements you make on the bike. Pay attention to whether the crown pressure stays even and whether the helmet stays planted when you move.

Take it off and check for red marks. Light marks that fade fast are common with a fresh liner. Deep pressure spots that stay angry are a warning sign. If you feel one hard point on the forehead, temples, or rear crown, don’t assume break-in will fix it.

Mistakes That Throw Off Helmet Sizing

A lot of bad helmet buys come from small measuring mistakes, not bad charts. These are the ones that cause the most trouble:

• Measuring too low on the forehead
• Pulling the tape too tight
• Starting with hat size instead of head circumference
• Choosing a loose fit because it feels nicer in the first minute
• Skipping the product-page chart for the exact Bell model

One more trap: comparing your old broken-in helmet with a brand-new one. Old padding can hide the fact that your current lid has gone loose. A fresh Bell should feel firmer than the helmet you’ve worn for years.

Picking Your Bell Size Without Guesswork

If you want the safest bet, measure your head in centimeters, match that number to Bell’s general chart, then verify the product-page size chart for the helmet you want. After that, do a real fit check with the helmet worn low on the forehead, cheek pads touching the face, and the strap snug under the chin.

That process cuts out most of the guesswork. The chart gets you close. Your tape measure narrows it down. The wear test settles the rest. Do those three things, and you’ll have a Bell helmet size that feels right in the garage and stays right once the ride starts.