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How to Measure Your Head for a Custom Helmet Online

  • Writer: jamesjordan
    jamesjordan
  • 5 days ago
  • 5 min read

To measure your head for a custom helmet online, wrap a soft tape around the widest part of your head — about an inch above your eyebrows and the top of your ears — keep it level and snug, and take the largest of two or three readings in centimeters. Match that number to the specific brand's size chart, factor in your head shape, and only commit to custom paint after the bare helmet's fit is confirmed.

Key takeaways

  • Measure at the widest point, level, about an inch above the brows and ears.

  • Use centimeters and the largest consistent reading of two or three tries.

  • Sizes are not standardized — always use the exact brand's chart.

  • Head shape (round, intermediate, long oval) matters as much as circumference.

  • Confirm bare-helmet fit before paying for custom paint.

Why measuring matters more for custom orders

When you buy a stock helmet in a shop, you can try three sizes and walk out with the one that fits. Ordering custom online removes that safety net, and a custom-painted shell is far harder to return than a plain one. Getting the measurement right the first time is the difference between a helmet you wear for years and an expensive paperweight.

A helmet that is too big is not just uncomfortable — it can rotate or lift at speed and it loses protective contact in a crash. A helmet that is too small gives you headaches and pressure points you will never get used to. The correct size sits snug all the way around with no single hot spot.

Step by step: measuring your head

Use a flexible fabric tape measure. If you only have a rigid tape, run a piece of string around your head, mark it, then lay it flat against a ruler. Stand in front of a mirror so you can keep the tape level.

  • Position the tape about one inch (two to three centimeters) above your eyebrows.

  • Run it around the fullest part of the back of your skull and just above your ears.

  • Keep the tape parallel to the floor — tilting it throws the number off.

  • Pull snug, not tight; the tape should sit flat against your hair.

  • Measure two or three times and record the largest consistent figure.

Write the number down in centimeters. Most brand charts use centimeters as the primary scale, and converting back and forth from inches introduces rounding errors that can push you into the wrong size.

Reading the brand size chart

Here is the part riders skip: helmet sizes are not standardized. A medium from one maker can match a small or a large from another. Pull up the chart for the exact brand and model you want, find where your measurement lands, and trust the chart over your usual size. Our guide to where to get custom motorcycle helmets online covers which sellers publish reliable sizing information.

If your measurement sits on the line between two sizes, lean toward the smaller one when the larger feels loose, since the comfort liner compresses slightly with use. Only size up if the smaller shell creates real pressure points in the first few minutes.

Head shape: the step most people miss

Circumference tells you the size; shape tells you whether that size will actually feel right. Look down at the top of your head in a mirror. A nearly circular outline is round-oval, a slightly longer front-to-back outline is intermediate-oval (the most common by far), and a clearly elongated outline is long-oval.

Match the shell's internal shape to your head shape and a correctly sized helmet feels broken-in on day one. Get it wrong and you will feel forehead pressure or side gaps no amount of sizing fixes. For the full breakdown of how online fitting handles this, read how custom helmet fitting works when you buy online.

Checking the fit when it arrives

Put the helmet on and fasten the strap. It should feel snug with even pressure all around. Try to rotate it side to side and up and down — the skin of your forehead should move with the helmet, not slide under it. Wear it for at least fifteen to twenty minutes; pressure points that appear in that window will only get worse on a long ride.

If the shell fits but the cheeks are loose or tight, many helmets let you swap cheek pads to dial it in. That is a far better fix than changing the whole shell size. Once the bare helmet is confirmed, you can confidently send it for the custom graphic style you want.

Frequently asked questions

What is the best way to measure my head for a helmet?

Wrap a soft cloth or fabric tape around your head about an inch above your eyebrows and ears, at the widest point. Keep the tape level and snug but not tight, measure two or three times, and use the largest consistent reading. If you only have a rigid tape, use a string and measure it afterward against a ruler.

Do I round up or down between two helmet sizes?

If you land between sizes, most riders are better off with the smaller size if the larger one feels loose, because the foam liner will break in slightly and compress with use. A loose helmet can shift in a crash. That said, if the smaller size causes pressure points or hot spots within a few minutes, size up and address fit with cheek pad swaps.

Are helmet sizes the same across brands?

No. A medium in one brand can fit like a small or large in another, and shell shapes differ between round, intermediate-oval, and long-oval heads. Always check the specific brand's size chart against your measurement rather than assuming your usual size carries over.

What head shape do I have and why does it matter?

Looking down at the top of your head in a mirror, a nearly round outline is round-oval, slightly longer front-to-back is intermediate-oval (the most common), and clearly long front-to-back is long-oval. Matching shell shape to head shape prevents the forehead or side pressure that makes a correctly sized helmet still feel wrong.

Can I trust an online size chart for a custom helmet?

Yes, if you measure carefully and read the brand's chart and shape notes. The bigger risk with custom orders is committing to paint before confirming fit, so order the base helmet, confirm the fit over a few sessions, and only then send it out for custom work.

The bottom line

Measuring your head is two minutes of careful work that protects a serious investment. Use a soft tape at the widest point, trust the brand chart, account for your head shape, and confirm the bare-helmet fit before any paint goes on.

When the helmet fits and you are ready to build out the rest of your kit, Legendary USA's American-made riding gear is a dependable place to match a quality helmet with quality gloves, jackets, and vests. Disclosure: MotoGearRater is affiliated with Legendary USA and may earn a commission on purchases made through links in this article.

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