How to determine the size of your bike helmet

How to choose a bicycle helmet?

determine, size, your, bike, helmet

Few people drive a car without seat belts. So why ride a bike without a helmet? A helmet is a must in all conditions and situations.

Additional helmet features

Ventilation: Air vents in the helmet increase overhead wind flow for a more comfortable ride. The more holes, the lighter the helmet.

Visor: Some riders prefer to have a sun visor attached to the helmet. It is very common on mountain helmets. Visor will add light weight and wind resistance.

Full face protection: some mountain helmets have an enclosed design to provide face protection when riding in the mountains.

Belts: Belts should be comfortable and easy to unfasten.

Hair hole: Some helmets have a hair hole through which long or ponytail hair can be passed.

Types of bicycle helmets

Helmets come in three main types: multifunctional, mountain bike and road bike helmets. All types are designed to protect the head from impact, while being lightweight and comfortable.

Multifunctional helmets. an economical choice for leisure, commuter, road and mountain travel. They are also popular with skateboarders and rollers and usually have sun visors to protect their eyes.

Road helmets are preferred by road-only cyclists for their low weight, ventilation and aerodynamic design. These helmets generally lack a visor to keep the weight low and provide an unobstructed view.

Mountain biking helmets feature visors, reinforced backs and a durable, secure fit when riding over rough terrain.

Bicycle helmet device

Most helmets use molds, a popular process that preserves the outer and inner shells without the use of glue. The result is lightweight yet durable designs. Usually for inexperienced cyclists, weight does not matter, but riders need a lighter helmet.

Sheath: Most helmets are protected by a plastic sheath to protect the head and neck.

Liner: Most helmet liners are made from Styrofoam. The liner reduces impact force to protect the head. Make sure your head is comfortable in the liner.

Determining the size of the helmet

A properly sized helmet is vital. Usually helmets come in small, medium, large sizes. There are also helmets that can be adjusted in size.

To find the right size, you need to wrap the widest part of the head above the eyebrows with a measuring tape. Or wrap a tape or rope around your head, then measure the length of the rope with a ruler.

  • Very small: 51 cm
  • Small: 51-55cm
  • Medium: 55-59 cm
  • Large: 59-63cm
  • Very large: above 63
  • Universal size for men: 54-61 cm
  • Universal size for women: 50-57 cm
  • Universal size for children: 46-57 cm

If the measurements fluctuate towards a larger or smaller size, then there will be two options: choose a smaller size, but endure some inconvenience; put on a bicycle cap under a larger helmet for more convenience.


Adult (male). standard helmet.

Child / Adolescent. Used by children (5 to 10 years old) and adolescents (10 to 15 years old). It looks and feels like a small to medium MTB or road helmet, decorated with graphics and painted in vibrant colors. There are also ventilation holes.

Unisex. designed for both men and women.

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Female. differs from male by the presence of a hole for long hair (braids or tail), jewelry (flowers, etc.). It is usually painted in pastel or bright colors.


The vast majority of helmets are bicycle helmets. Rollerski helmets come in two varieties:

  • freeskate helmets. used for normal riding (fitness, speed skating). Similar to XC helmets, but with less nape;
  • bowlers. designed for jumping tricks. Similar to bicycle bowlers.
  • Classic rollerblade helmet
  • Rollerski helmet bowler hat

Cross-country (MTB helmet). a universal option (suitable for cross-country, tourism, various competitions, walking). The optimal balance between comfort, protection and lightness. Often equipped with a removable visor that protects the eyes from sun, rain and tree blows.

Road Helmet. Similar in appearance to an XC helmet, however there is no visor. Lightweight and well ventilated. Not designed for heavy loads and does not protect against dirt.

Bowler hat. designed for BMX, dirt jumping, street, trial and other “urban” styles of extreme riding. Has a semicircular shape. Sufficiently durable and lightweight helmet, but has a minimum number of vents.

Full-face. used for downhill, freeride, aggressive straight, dirt jumping, trail. Provides maximum protection for the face and head. It resembles a motocross helmet and features a powerful jaw (protects the chin) and a large visor that protects against dirt and branches. It is heavy, there is no ventilation. Most expensive helmet.

Aerodynamic helmet. designed for racing. Differs in elongation of shape, lack of ventilation, high weight. These helmets are uncomfortable, but they reduce aerodynamic drag.

  • MTV Bicycle Helmet
  • Bicycle helmet-bowler hat
  • Fullface bike helmet


Visor. protects from the sun, dirt, branches, rain, but impairs the visibility of the road, makes the helmet heavier and vibrates in the wind.

Ventilation. provided by special holes that create air flow around the head. Head cooling and helmet price depend on the number of holes (up to 20), their location (front, top and back) and shape.

Adjustable Size. A system that adjusts the helmet to the size of the athlete’s head. It is carried out using a strap at the back of the head or Velcro fasteners. The safest and most comfortable helmets have straps over the top.

Important: in order to choose the right helmet for your head size, you need to measure the head circumference with a centimeter. The tape is located just above the ears and at the same level in the front and back.

Helmet weight is important for professional riders as well as those who use their bike frequently or travel long distances. The lighter the helmet, the more comfortable it is. The price of a lightweight and at the same time durable helmet is higher.

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Sheath, frame and lining

The outer shell of the helmet is made of ABS plastic or polycarbonate. The first material is cheaper and less durable, used for cross-country helmets, children / teenagers, the second is more expensive, but its strength is much higher, bowlers, full-face are made from it.

The frame of the helmet is made of expanded polystyrene. It absorbs shock and prevents head injuries.

The lining and fabric of the helmet liner provides comfort to the head and wicks away sweat. They develop an unpleasant odor over time, so they must be removable so that they can be washed.


If you need to buy a helmet cheaper, then you should pay attention to the products of Explore, Longus, Profi Trike, Amigo. these are Russian or Chinese brands. It is quite possible to find and choose a comfortable helmet among them, but be sure to pay attention to small details: fasteners, straps, fasteners. they are the ones that tend to fail quickly and forever.

Children’s helmets constitute a special category: Bellelli, Kiddimoto and others. Here attractive design plays the most important role: it is he who is able to attract the child and teach him to “correct” and safe equipment. However, it is worth noting that good brands nevertheless also meet all safety requirements according to world standards.

How to determine head size and choose the right helmet

The KED bicycle helmet is designed to protect the cyclist’s head from impacts in the event of a fall, and for effective protection, it must be the right size for the head. The helmet is recommended for all cyclists, both children and adults, regardless of riding style or riding location. Helmet can save your life and health in an emergency.

On our website, you can choose a helmet for any style, for every taste and head size. Thanks to the use of the most modern technologies and materials by the manufacturer, in addition to excellent shock absorption, KED helmets have a minimum weight and good ventilation. Therefore, it is difficult to come up with arguments for traveling without a helmet. All that remains is to choose the KED helmet that suits your needs and fits your head size.

All KED helmets are adjustable in size and the range of adjustment varies by model. Try to choose a helmet, the size of which will be able to adjust both up and down in relation to the size of your head.

If two sizes of helmets suit you in this way, it is recommended that you choose the smaller size. Firstly, according to safety requirements (since a helmet is bought precisely for the sake of safety, and not just for beauty), the helmet should fit snugly on the head and should not cause discomfort, otherwise the degree of its protection will be significantly less. Secondly, a large helmet can fly off the head during a fall, and thirdly, a smaller helmet usually looks better on the head. It should also be borne in mind that the inner lining of the helmets wears out a little over time.

When trying on a KED helmet upon receipt, you need to adjust it to the size of your head, for which first turn the wheel at the back of the helmet to adjust the size of the head ring so that the helmet fits snugly on your head. The helmet should fit horizontally on the head, providing forehead protection but not obstructing vision. Check the fit of the helmet by shaking your head with the chin strap open. In this case, the helmet should not slip. Then adjust the chin strap by opening the latches and sliding the strap tensioners so that the front and rear straps meet under the ear and center the lock under the chin. If the straps are loose, pull them up at the chin lock. To do this, open the catch and pull the strap to the desired length. Adjust the straps until you achieve a snug and secure fit. Close the latch on the chin lock and strap tensioners. The chin lock should not rest directly on the chin and should not interfere with breathing or swallowing.

If you are comfortable in the chosen helmet, do not forget to look in the mirror. the helmet should look good for you.


How to determine the size of your boxing helmet?

For an athlete who is engaged in martial arts, the selection of protective equipment is very important, because this criterion determines how traumatic a fight can be. In this sense, the following question is conceptually significant: how to choose the size of a boxing helmet? We talked about the typological features of such helmets in another article, now let’s dwell on the metric parameters.

To choose a boxing helmet by size, it is necessary to clearly understand what functions of the equipment are determined by its dimensions. In this sense, it is worth paying attention to the following parameters:

  • comfort of use (an athlete should be comfortable in a helmet, discomfort will distract during a fight and reduce concentration, but you need to understand that working in equipment is always a matter of habit);
  • tight fit (the helmet should sit tightly on the head, but not squeeze it, it should in no case fall off, but some “play” is necessary so that the helmet does not pinch the head);
  • adequate view (when choosing a boxing helmet by size, pay attention to how well you see in it, if the equipment significantly complicates the view, then it makes sense to turn to another model).

Boxing helmets, like any sports equipment, have their own size range, which is determined by the girth of the athlete’s head. That is, if you do not know how to find out the size of a boxing helmet, then pay attention to the tag, which is usually located on the back of the inside of the helmet. The tag will show Latin letters. from XS to XL. This is an indication of the head circumference for which this helmet is optimal. The girth is measured using a regular centimeter, it is not difficult. When choosing a boxing helmet by size, consider the correspondence of marking and girth:

  • XS / S. from 50 to 55 centimeters.
  • M. from 55 to 58 centimeters.
  • L. from 58 to 60 centimeters.
  • XL. from 60 to 62 centimeters.
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Of course, as in the case of clothing, the sizes are somewhat arbitrary. In the sense that head circumference is objectively not the only criterion, and sometimes it is not enough to find an answer to the question of how to determine the size of a boxing helmet. The shape of the skull, its natural irregularities, the athlete’s hairstyle play a role. Therefore, for example, a helmet of size L can suit a fighter with a head circumference of 55 and 61 centimeters, so the choice of a helmet is a purely individual question.

How to determine the size of your bike helmet

  • Modular helmets
  • Integrals
  • Open helmets
  • Chinese open helmets
  • Open helmets with visor
  • Half open helmets
  • Open helmets with visor
  • Visors
  • Pinlocks
  • Women’s motorcycle helmets
  • Women’s integral helmets
  • ATV helmets for women
  • Women’s Scooter Helmets
  • Budget Helmets
  • Cool motorcycle helmets
  • Exclusive motorcycle helmets
  • Unusual motorcycle helmets
  • Winter helmets
  • Winter ATV helmets
  • Heated Winter Helmets
  • Cross Helmets with Visor
  • Japanese motorcycle helmets
  • Enduro helmets
  • Enduro visor helmets
  • Helmet accessories
  • Helmet tails
  • Helmet Bags
  • Backpacks for motorcycle helmet
  • Moto clothes
  • Motorcycle jackets
  • Denim Motorcycle Jackets
  • Motorcycle sweatshirts
  • Motorcycle shirts
  • Trousers
  • Motorcycle jeans
  • Moto gloves
  • Fingerless gloves
  • Leather biker belts
  • Motorcycle T-Shirts
  • Motorcycle vests
  • Heated Motorcycle Vests
  • Denim biker vests
  • Motobots
  • Motocross & Motorcycle Shoes
  • Classic Motoboots
  • Touring boots
  • Sports motoboots
  • Moto-protection
  • Mask
  • Knee pads
  • Elbow and shoulder protection
  • Knee and hip protection
  • Back protection
  • Turtle
  • Motorcycle accessories
  • Motorcycle headsets
  • Motorcycle headset kits
  • Parts and accessories
  • Anti-theft locks and chains
  • Anti-theft locks
  • Anti-theft chains
  • Backpacks
  • Motorcycle bags
  • Steering wheel mounts
  • Electrician
  • Protective covers
  • Tire Repair Kits
  • Camcorders
  • Stickers
  • Comforters
  • Comforters are white
  • Summer comforters
  • Balaclavas-comforters
  • Motorcycle glasses
  • Motorcycle gifts
  • Raincoats, vests, shoe covers
  • Thermal underwear
  • Motorcycle thermal underwear
  • Windstopper thermal underwear
  • Women’s thermal underwear
  • Thermal underwear Brubeck
  • Brubeck men’s thermal underwear
  • Women’s thermal underwear Brubeck
  • Thermal underwear Brubeck Cooler
  • Thermal underwear Brubeck Dry
  • Thermal underwear Brubeck Webster Termo
  • Brubeck moto underwear
  • Ski thermal underwear
  • Thermal underwear for men winter
  • Winter fleece thermal underwear
  • Thermal sweatshirts
  • Thermo-jackets
  • Winter thermal socks
  • Thermal winter socks for motorcyclists
  • Motorcycle socks
  • Consumables
  • Motor chemistry
  • Brake pads
  • Winter outfit
  • Ruroc helmets
  • Ruroc Snowboard Helmets
  • Snowmobile goggles
  • Glasses 509
  • 509 goggles for snowmobile
  • Scott Snowmobile Goggles
  • Heated Snowmobile Goggles
  • FXR Shoes
  • Scott Shoes
  • Balaclavas are winter
  • Balaclavas white winter
  • Balaclavas Brubeck
  • Winter balaclava masks
  • Winter fleece balakalavas
  • Winter comforters
  • Fleece comforters
  • Brubeck Comforters
  • Scott winter comforters
  • Winter comforters under the helmet
  • Snowmobile liners
  • Heat-resistant winter liners
  • Winter motorcycle equipment
  • Winter motorcycle gloves
  • Winter helmets
  • Heated modular helmets
  • Heated helmets
  • Snowmobile equipment
  • Snowmobile equipment Scott
  • Women’s snowmobile equipment
  • Snowmobile Equipment Bags
  • Snowmobile backpacks
  • Snowmobile Jackets
  • Snowmobile boots
  • FXR Snow Boots
  • Snowmobile gloves
  • Snowmobile Suits
  • Women’s Snowmobile Suits
  • Snowmobile Pants
  • Snowmobile overalls
  • Snowmobile winter overalls for men
  • Scott Jumpsuits
  • Jumpsuits FXR
  • Snowmobile protection
  • Ski masks
  • Children’s ski masks
  • Snowmobile helmets
  • Heated snowmobile modular helmets
  • Winter visors
  • Carbon Fiber Snowmobile Helmets
  • Legion Snowmobile Helmets
  • Modular snowmobile helmets
  • Snowmobile motocross helmets
  • Heated Snowmobile Helmets
  • XTR Helmets
  • XTR Snowmobile Helmets
  • XTR Mode modular helmets
  • Snowmobile helmets 509
  • Ski helmets
  • Giro Ski Helmets
  • Giro kids helmets
  • Giro snowboard helmets
  • Premium ski helmets
  • Ski helmets carbon
  • Ski sport helmets
  • Closed ski helmets
  • Ski mirrored helmets
  • Teenage Ski Helmets
  • Ski helmets with visor
  • Kids ski helmets
  • Ski helmets for women
  • Ski helmets for men
  • Heated clothes
  • Winter hats
  • FXR outfit
  • Cross and enduro equipment
  • Jersey
  • Gloves
  • Trousers
  • Motorcycle books and motorcycle magazines
  • AGV Helmet Size Chart

    Models Pista GP R, Corsa R, Veloce S (4 shell sizes)

    Helmet size

    Head circumference (cm)

    53-54 55-56 57-58 59-60 60-61 61-62 63-64

    Models K-5 S, K-3 SV (2 shell sizes)

    Helmet size

    Head circumference (cm)

    53-54 55-56 57 58 59-60 61-62 63-64

    Model AX-8 Naked (3 shell sizes)

    Helmet size

    Head circumference (cm)

    51-52 53-54 55-56 57-58 59-60 61-62 63-64 65-66

    Sportmodular (3 shell sizes)

    Helmet size

    Head circumference (cm)

    52-53 53-54 55-56 57-58 58-59 60-61 61-62 63-64

    Model AX-8 Dual Carbon (3 shell sizes)

    Helmet size

    Head circumference (cm)

    52-53 53-54 55-56 57-58 58-59 60-61 61-62 63-64

    Model AX-8 Dual Evo, AX-8 Carbon, AX-8 Evo (3 shell sizes)

    Helmet size

    Head circumference (cm)

    51-52 53-54 55-56 57-58 59-60 61-62 63-64 65-66

    Compact ST model (1 casing size)

    Helmet size

    Head circumference (cm)

    XS S M L XL
    53-54 55-56 57-58 59-60 61

    Model K-5 Jet (2 shell sizes)

    Helmet size

    Head circumference (cm)

    53-54 55-56 57-58 59-60 60-61 61-62 63-64

    Fluid model (2 shell sizes)

    Helmet size

    Head circumference (cm)

    XS S M L XL
    53-54 55-56 57-58 58-59 61

    Model AGO-1, Gloria, Super AGV, Pasolini, Trofeo (3 shell sizes)

    Helmet size

    Head circumference (cm)

    53-54 55 56 57-58 59 60-61 62-63

    Helmet sizes and matching tables. what sellers are silent about

    The standard advice that every website boasts of how to determine the size of a helmet is: measure the head circumference with a tape and choose your size from the table of sizes for motorcycle helmets.

    Sizing charts for motorcycle helmets can help with sizing, just keep in mind the above, treat them with some skepticism. Yes, yes, the Shoei helmet M (57-58cm) is not the same as the Arai M (57-58cm) helmet. over, even different models from the same manufacturer differ in size and fit. Therefore, here we present tables of sizes of moto helmets from official sources and supplement with Комментарии и мнения владельцев. which models do not correspond to the declared values, which features of the fit of the helmets. If there are no Комментарии и мнения владельцев, then either the helmets correspond to the stated dimensions, or we have no data. The tables will change in the course of life, we will make changes taking into account the collective experience. Therefore, we ask you to write about the size discrepancies that you encountered to

    Nolan Helmet Size Chart

    Models N100-5 and N44 Evo (2 shell sizes)

    Helmet size

    Head circumference (cm)

    54 55 56 58 60 62 64 65

    Model N90-2, N60-5, N40-5 GT and N40-5

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    Bike Helmet Fit Guide. Helmet Sizing Guide. How To Size A Bike Helmet

    Helmet size

    Head circumference (cm)

    54 55 56 58 60 62 63

    Model N87 (2 shell sizes)

    Helmet size

    Head circumference (cm)

    54 55 56 58 61 62 63 64

    Model N53 (2 shell sizes)

    Helmet size

    Head circumference (cm)

    54 55 56 58 60 61 63 64
    Helmet size

    Head circumference (cm)

    54 55 56 58 60 61

    Models N21 Visor and N21 (2 shell sizes)

    Helmet size

    Head circumference (cm)

    54 55 56 58 59 61 63 64

    Airoh Helmet Size Chart

    How to choose the size

    The helmet should fit snugly against the cyclist’s head, there should be no free space. It should securely cover both the top of the forehead (a few centimeters above the eyebrows) and the back of the head. When falling, it is the helmet that must take the blow. The helmet strap should not be too tight (the head should turn freely without discomfort) and not too loose (the strap should fit snugly on the chin). To make sure that the headset is correctly tuned, you need to turn your head from left to right and from top to bottom: neither the helmet nor the belt should move or interfere with you.

    for kids

    The choice of a child’s helmet is also made depending on the size of the head girth, but it should be borne in mind that children grow up very quickly, and it is necessary to correctly and timely determine the size of the helmet for them. Most children’s cycling helmets are equipped with a special adjustment wheel that allows you to adjust the helmet to the volume of the child’s head.

    road bike

    A helmet of this type has a similar shape to a helmet for a mountain bike, it has an even lighter weight, better aerodynamic properties and even more ventilated holes, and it also does not have a visor. Such a helmet will come in handy during long and high-speed cycling on asphalt tracks.

    mountain biking

    The basket-shaped mountain bike helmet is the most common helmet for cyclists and is well suited for everyday cycling. It is light enough, has good aerodynamic properties and has enough openings for better head ventilation. It has a visor on the front, which protects the face during a fall.

    How to determine the size of your bike helmet

    for riding hybrid and city bikes

    Hybrid and city bike helmets are very similar to mountain bike helmets, but tend to be more rounded. They are also equipped with air vents and have good aerodynamic properties.

    Chin straps

    The straps are designed to fix the helmet on the head so that it does not dangle during sharp turns. Belts should be tied tightly, but should not create severe discomfort in jaw movements (for example, when chewing gum).

    How to regulate helmet ventilation?

    The vents in the special winter bike helmet are a great idea, although they might seem pointless. We will appreciate this design, especially if we like to ride with the breeze, and our driving style is quite sharp. So, on a winter, windy and even cold day (let’s say up to 10 o C) while riding a bike, the head is not blown through the ventilation holes.

    Some models have airflow control. The easiest way is Weatherstrip plugs. these are sealing plugs that close the holes. When it’s very cold, the holes need to be closed, and when you start to sweat, get the plugs out. There is also a more elegant solution to the problem. the Thermostat system, in which ventilation can be adjusted by moving a button or flap on the helmet even while driving (it blocks and lets the air flow).

    How a bicycle helmet should sit on your head?

    The front of the helmet should be just above the eyebrows. If it is planted too low, visibility can be reduced, and this will have a direct impact on our security, and negatively. In turn, if the helmet “sits” too high, then it will not be able to fully protect during the fall. The easiest way is to adjust the position of the helmet on your head. is to wear cycling goggles. Correct position of the helmet on the head. this is when a small gap (1-3 cm) will be left between the helmet and the goggles.

    How to choose the size?

    Measure the circumference of your head above your eyebrows with a tape measure. The tape should not be too loose or too tight on the head.

    For example, we give the size range (marking) of Giro bicycle helmets. But do not forget that the dimensional tables of other manufacturers will differ from those given below.

    How to measure for a bike helmet


    A safety helmet is the most important piece of equipment for a cyclist. In the end, he must preserve health, and sometimes save our lives in case of unforeseen situations. In this article, we provide tips on how to choose the right size for a bicycle helmet so that it can fulfill its intended function.

    How to clean a bicycle helmet?

    The helmet should be washed with soap and water or another mild detergent. We do not recommend washing the helmet shell with gasoline, kerosene, etc., as this can lead to visible damage to the polymer material (color, paint, plastic deformation). The inner liner. a sponge. can be taken out and washed in soapy water. Unpleasant odors can be removed by rinsing the sponge in water with a little baking soda (first dissolve the soda in water). Do not dry the liner in an oven or microwave oven. High temperatures (above 140 degrees) can melt the helmet shell and other synthetic materials (liner sponge), and a fire hazard can also be created. Although the helmet is made of modern and reliable materials, we recommend that you avoid direct sunlight (e.g. in a car) for long periods of time.