Helmet Size Chart
A helmet only protects properly if it fits. This printable pack helps you measure heads accurately and match them to typical helmet sizes for cycling, motorcycling, skiing and horse riding — with a paper measuring tape you can print, fit checklists for each sport and a record sheet for the whole family’s sizes and helmet ages.
Helmet Size Chart Pack
Printable helmet sizing pack: head measuring guide, paper measuring tape, size charts for bike, kids’ bike, motorcycle, ski and equestrian helmets, fit checklists and a family helmet record.
- Measuring tape (PDF)
- Size charts (PDF/XLSX)
- Bike fit check (PDF, DOCX)
- Motorcycle fit check (PDF, DOCX)
- Ski fit check (PDF, DOCX)
- Family record (XLSX)
Formats: PDF, XLSX, DOCX. Instant download after payment (link valid 72 hours, up to 5 downloads). AI-assisted: the templates were drafted with AI help and reviewed and laid out by Kedop.
$5.00 USD, one-time
Secure card checkout by Stripe. Full refund within 7 days — see the refund policy and license.
How to measure your head for a helmet
- Use a soft tape measure, or print the paper tape in the pack.
- Wrap it around the widest part of the head: about 2.5 cm (1 in) above the eyebrows and ears, and around the back at the fullest point.
- Keep the tape level and snug, but not tight.
- Measure two or three times and use the largest reading.
- For long hair, measure with the hair styled as you will wear it riding.
Measure in centimetres if you can — most helmet makers size in centimetres.
Typical helmet sizes
| Helmet type | Size | Head circumference (cm) |
|---|---|---|
| Bike — adult | S | 51–55 |
| M | 55–59 | |
| L | 59–63 | |
| Bike — children | Toddler | 44–50 |
| Child | 48–54 | |
| Youth | 52–56 | |
| Motorcycle | XS | 53–54 |
| S | 55–56 | |
| M | 57–58 | |
| L | 59–60 | |
| XL | 61–62 | |
| XXL | 63–64 | |
| Ski and snowboard | S | 52–55 |
| M | 55–59 | |
| L | 59–62 | |
| XL | 62–65 | |
| Equestrian | 6 5/8 | 53 |
| 6 3/4 | 54 | |
| 6 7/8 | 55 | |
| 7 | 56 | |
| 7 1/8 | 57 | |
| 7 1/4 | 58 | |
| 7 3/8 | 59 | |
| 7 1/2 | 60 | |
| 7 5/8 | 61 |
These are typical ranges — sizes vary between brands and even between models from the same brand. Always check the maker’s own size chart and try the helmet on if you can.
Converting to inches
| cm | inches | cm | inches |
|---|---|---|---|
| 48 | 18.9 | 50 | 19.7 |
| 52 | 20.5 | 54 | 21.3 |
| 56 | 22.0 | 58 | 22.8 |
| 60 | 23.6 | 62 | 24.4 |
| 64 | 25.2 | 66 | 26.0 |
How a helmet should fit
- Level: it sits level on the head, about two fingers’ width above the eyebrows for bike helmets.
- Snug: it doesn’t rock side to side or front to back when you shake your head.
- Straps: side straps form a “V” just below the ears; you can fit one or two fingers under the chin strap.
- Motorcycle: the cheek pads press firmly; the helmet shouldn’t roll forward off the head when pulled from the back.
- Ski: no gap between helmet and goggles.
- Comfort: no pressure points after 10–15 minutes of wear.
When to replace a helmet
Replace any helmet after a crash or significant impact, even if it looks fine — the protective foam is designed to crush once. Many manufacturers also recommend replacement after a number of years because materials age; follow the guidance for your helmet. Children usually outgrow helmets every few years. The family record sheet in the pack lets you note purchase dates and sizes so you know when to check.
Safety standards
Look for the safety certification that applies where you ride — for example CPSC for bicycle helmets in the US, EN 1078 in Europe, DOT or ECE 22.06 for motorcycle helmets, EN 1077 or ASTM F2040 for snow sports and ASTM F1163 or PAS 015 for equestrian helmets. The pack’s fit checklists include a line to confirm the certification label.
What’s in the pack
- Head measuring guide with diagrams.
- Printable paper measuring tape in cm and inches.
- Size charts for adult and children’s bike, motorcycle, ski and equestrian helmets.
- Fit checklists for each type of helmet.
- Family helmet record (PDF and Excel) with purchase dates and sizes.
AI-assisted content
Charts and guides were compiled with AI assistance and reviewed by Kedop. Sizes are typical ranges; manufacturers’ charts take priority.
Frequently asked questions
How do I measure my head for a helmet?
Measure around the widest part, about 2.5 cm above the eyebrows, and use the largest reading.
What size helmet do I need for a 57 cm head?
Often a medium in bike and ski helmets, and a medium in many motorcycle charts — check the brand’s chart.
What if I’m between sizes?
Try both; many people choose the smaller size if it fits comfortably, but fit and comfort must come first.
How often should I replace a helmet?
After any crash, and according to the manufacturer’s age guidance.
Does the pack include a printable measuring tape?
Yes, in centimetres and inches.
Is this a subscription?
No, it is a one-time download.