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Get your helmet fit right.
A better ride starts with the right fit. Measure your head, check the chart for your exact Bell model, then take time to check how it feels.
Find your Bell modelMeasure first. Choose second.
01
Grab a soft tape
Use a flexible measuring tape, or string measured against a ruler. Record your head circumference in centimetres.
02
Find the widest point
Place the tape about 2.5 cm above your eyebrows, just above your ears and around the fullest part of the back of your head. Keep it level and snug without pulling it tight.
03
Measure again
Repeat to confirm your measurement. Use the largest consistent reading and compare it with the chart for the exact brand and model.
Your old helmet size is only a clue. The same size label can fit differently between brands and models. Head shape matters too. A size chart gives you a starting point; trying the helmet on confirms the fit.
Find your Bell helmet model
Choose your exact model below. Measurements are head circumference in centimetres. Check the sizes available on the product listing; adult and youth sizing are different.
Adult moto size chart
| Size | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 54–56 | 56–58 | 58–60 | 60–62 | 62–64 | 64–66 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Bullitt GT Carbon / Bullitt GT
| Size | XS | S | M | L | XL | XXL |
|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Custom 500 Carbon / Custom 500
| Size | XS | S | M | L | XL | XXL |
|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Eliminator/Eliminator Carbon
| Size | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 | 65–66 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Lithium/Lithium Mips
| Size | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 | 64–66 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Magnum
| Size | XS | S | M | L | XL | XXL |
|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Moto-10 Spherical / Moto-10 Mips / Moto-10 GP
| Size | XS | S | M | L | XL | XXL |
|---|---|---|---|---|---|---|
| Head (cm) | 54–55 | 55–56 | 57–58 | 58–59 | 60–61 | 61–62 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Moto-3
| Size | XS | S | M | L | XL | XXL |
|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
MX-10 Mips
| Size | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 | 65–66 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
MX-10 Mips Youth
| Size | YS | YM | YL |
|---|---|---|---|
| Head (cm) | 48–51 | 51–52 | 52–53 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
MX-9 Adventure
| Size | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 | 65–66 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Pit Boss
| Size | XS/S | M | L | XL/XXL | XXXL |
|---|---|---|---|---|---|
| Head (cm) | 53–54 | 57–58 | 59–60 | 61–63 | 63–64 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Qualifier
| Size | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 | 65–66 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Race Star DLX
| Size | XS | S | M | L | XL | XXL |
|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Scout Air
| Size | S | M | L | XL | XXL |
|---|---|---|---|---|---|
| Head (cm) | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
SRT Modular/SRT Modular Night Rider
| Size | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 | 65–66 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
TX501
| Size | XS | S | M | L | XL | XXL |
|---|---|---|---|---|---|---|
| Head (cm) | 53–54 | 55–56 | 57–58 | 59–60 | 61–62 | 63–64 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Youth moto size chart
| Size | S/M |
|---|---|
| Head (cm) | 49–51 |
Use this chart as a starting point. Model-specific fitting instructions take priority. If you are between ranges or unsure about your model, contact our team before ordering.
Can’t find your model? Older models, model generations and regional versions may use a different chart. Send us the exact model name or product link and your measurement so we can help confirm sizing.
Check the fit before you ride
Try the helmet indoors for around 15 minutes, following the manufacturer’s fitting instructions. Wear the glasses you normally ride with and fasten the chin strap correctly.
A secure, comfortable fit
- Firm, even contact around your head without painful spots.
- Your skin moves with the helmet when you gently move it side to side.
- On helmets with cheek pads, the pads make firm contact with your cheeks.
- The helmet stays in position and your vision remains clear.
Pause and ask for help if…
- The helmet slides or rotates independently of your head.
- You feel a focused pressure point on your forehead or temples.
- You experience pain, numbness or a headache.
- The helmet rolls forward over your eyes or feels insecure with the strap fastened.
Snug should not mean painful. Comfort padding can settle with use, but don’t rely on a painful helmet becoming suitable. Don’t size up automatically to fix one pressure point: a different model or head shape may be the better solution.
Common sizing questions
What if I’m between sizes?
Follow the advice for your exact helmet model and try both sizes where possible. Tell us your measurement and the helmet you are considering so we can help. Avoid guessing from a general “size up” or “size down” rule.
Can different cheek pads fix the fit?
Some models accept manufacturer-approved replacement cheek pads or liners. These may fine-tune fit when the helmet is already the correct size and shape. Ask us to check compatibility. Never cut, compress or modify the protective liner or shell.
Can I exchange a helmet that doesn’t fit?
Read our current returns policy before ordering. If the fit feels wrong when it arrives, contact us before riding in it or making changes. Our team can explain the options for your order.
Still unsure? Ask Bell Helmets Online.
Send us your head measurement in centimetres, the brand and model you’re considering, and where your current helmet feels tight or loose. Our Australian team can help you check the model and size before you order.
Get helmet sizing helpBell motorcycle model chart data checked 14 October 2026. Charts provide a starting point, not a guarantee of fit. Check the product listing and model-specific instructions before ordering.