SIZE GUIDE
SIZE GUIDE
Find Your
Perfect Fit
Follow a few quick steps and tips to measure up and dial in the fit that moves with you.
How to find the right size?
To measure your head, use a flexible tape measure. If you don't have a tape measure, you can take a piece of string and wrap it around your head, then place it on a ruler.
Measure head circumference (B)
Wrap the tape measure around your head about 1 inch or 2,5 cm above your eyebrows and ears and make sure it's level all the way around.
Measure height (A)
Optional: you can also measure the distance from the center of your forehead to the top of your head.
Choose the right size
The fit should be firm, but not tight. If you’re at the upper end, consider going up one size if you prefer a looser fit. If you're in between sizes, please choose the larger size.
WATCH & LEARN
Measure your head
Watch these short videos to get an accurate head measurement for both children and adults.
Measuring for children
Gently wrap a soft measuring tape around your child’s head, just above the eyebrows and ears. Make sure it is snug but comfortable for an accurate measurement.
Discover helmets for kids
Measuring for adults
Use a soft measuring tape to take your head measurement. Place the tape just above your eyebrows and ears. It should fit snugly but not too tightly.
Discover helmets for adults
Sizing table 1
Use this size chart if you're interested in: Billie | Bowie | Lenny* | Lenny Summer | Iggy | Hardy | Fox | Kate | Harris | Chessy | Bieber
A
INCH
CM
B
INCH
CM
Mini
6.3"
16,0 cm
18.5-19.3"
47-49 cm
Midi
6.5"
16,5 cm
19.7-20.5"
50-52 cm
Maxi
6.9"
17,5 cm
20.8-21.6"
53-55 cm
Small
6.9"
17,5 cm
20.8-21.6"
53-55 cm
Medium
7.3"
18,5 cm
22.0-22.8"
56-58 cm
Large
7.7"
19,5 cm
23.2-24.0"
59-61 cm
Extra Large*
8.1"
20,5 cm
24.4-26.6"
62-65 cm
If you're in between sizes, please choose the larger size.
Sizing table 2
Use this size chart if you're interested in: Baseball Cap
A
INCH
CM
B
INCH
CM
Midi/Maxi
6.5"
16,5 cm
19.7-21.6"
50-55 cm
S/M
6.9"
17,5 cm
20.8-22.8"
53-58 cm
L/XL
7.3"
18,5 cm
23.2-25.6"
59-65 cm
If you're in between sizes, please choose the larger size.
How to measure your size?
In this video, we guide you through the steps to determine the right size. Follow these instructions to find your size.
FAQs
Keep these tips in mind:
Use a flexible measuring tape to measure the widest part of your head.
Make sure the tape is snug but not tight. Leave a little space so that the helmet sits comfortably and is not too close to your head.
Take the measurement while wearing your usual hairstyle, including ponytails, braids, thick hair, or curls. Do not press your hair flat.
Consider any accessories you typically wear with the helmet, such as glasses or hearing protection.
For the most accurate size, measure under normal conditions (not right after exercise or a hot shower).
If your measurement is at the upper end of a size range, we recommend choosing the larger size for comfort.
Double-check your measurements with the Ribcap team to ensure accuracy.
Always choose the larger size to ensure a comfortable fit. A slightly looser fit is better than one that is too tight.
You can use a piece of string or ribbon, wrap it around your head, and then measure the length against a ruler.
Our smallest kids helmet, the ‘mini’, can fit children with a head circumference of 47-49cm / 18.5-19.3 inches. This is typically suitable for children aged 5 years and up. There are children who have a larger head circumference and need an adult size. If your child is size "Maxi," your child may fit in the "Small" for adults, but we always recommend that you measure your child’s head first, to ensure the best possible fit.
Some Ribcaps have flexible materials that can slightly stretch over time. Wearing it for short periods may help it conform to your head shape.
If your Ribcap has adjustable straps or fastenings, try loosening them for a more comfortable fit.
If the material allows, you can try carefully stretching it by placing it over an object slightly larger than your head (like a ball) overnight.
If the fit remains uncomfortable, check our return or exchange policy to see if you can swap it for a better size.
Disclaimer: if you want to return the Ribcap helmet, it must be in the same condition as when you received it. If this is not the case, the return may be refused.
We know that we’re all different, in all shapes and sizes, but unfortunately, due to our focus on giving everyone access to Ribcap, we want to ensure that no one is left out, so we cater for the majority of users, as we’ve found that our sizes fit practically everyone.