How To Measure For a Motorcycle Helmet? Helmet Fitting Guide

A helmet is an absolute necessity if you drive a motorcycle. The more necessary thing to do is to wear the perfect sized helmet for your head to ensure your safety and comfort..

When you go to buy a helmet, there are a lot of varieties before you. But you need to buy the most appropriate one. So how should you do it? Do you know how should a motorcycle helmet fit? Do you know how to realize if a helmet is okay for you? 

In this article we’re going to lead you through some important trivia about the sizing of motorcycle helmets, their types, what’s your correct fit, which kind you should buy and why. You ought to know everything about the shield you’ll bet your life on and here’s your guide.

Helmet Sizes Chart

SizeCMSize of HatCircumference of Head  
X-small53-546-⅝ – 6-¾20.87″-21.26″
Small55-566-⅞- 721.65″-22.05″
Medium57-587-⅛-7-¼ 22.44″-23.83″
Large59-607-⅜ – 7-½ 23.23″-23.62″
X-Large61-627-⅝ – 7- ¾ 24.02″-24.41″
2X-Large63-647- ⅞ – 824.8″-25.2″
3X-Large65-668-⅛- 8-¼ 25.6″-26″
4X-Large67-688-⅜ – 8-½ 26.4″-26.8″
5X-Large69-708-⅝ – 8-¾ 27″-27.5″

You can easily choose a perfectly fitted helmet for you according to this size chart. With the help of this, motorbike helmet sizing becomes so much easier. All you need is to have the measurement of your head circumference and the hat size. The chart mentioned above is appropriate for adults. There’s also a youth helmet sizing chart available as well. 

How To Size A Motorcycle Helmet And Buy

How To Size A Motorcycle Helmet

Helmet Type

A quality helmet is undoubtedly one of the essentials while riding a bike. This safety gear can certainly protect your head from severe damage and injuries. 

Helmet Type

However, you can find a variety of helmets according to your need and preference. Nevertheless, among all the available options, you can classify them into six categories. These are- 

  1. Full Face Helmet
  2. Modular or Flip-up Helmet
  3. Off Road or Motocross Helmet
  4. Open Face Helmet
  5. Half Helmet or Pudding Basin Helmet
  6. Adventure or Dual Sport Helmet

1. Full Face Helmet

The full-face helmets are exclusively designed to provide you the protection of your entire head, face and neck. Additionally, it consists of a solid chin bar that saves your jaw and chin from potential injury. 

Full Face Helmet


  • Makes it durable and compact because of no hinges
  • Maximized protection to the head
  • Minimize the necessity of wearing goggles or sunglasses
  • Protection against wind, sun, debris, bugs etc


  • Minimize hearing flexibility
  • Can be suffocating sometimes

2. Modular Helmet

This kind of helmet design will provide you the flexibility of the chin bar according to your preference. Because, along with the traditional features of full-face helmets, it is incorporated with hinge features for ultimate protection. 

Modular Helmet


  • Excellent ventilation and cozy riding experience 
  • Provides flexibility of doing a range of activities without removing it.
  • Easy conversion of an open face helmet from full-face helmet. 


  • Slightly heavier 
  • Less safer than a full-face helmet during high speed driving. 

3. Off-Road Helmet

These lightweight helmets are usually designed with extended peaks and an elongated chin bar for maximum protection. As a result, these are appropriate for tough driving conditions. 

Off-Road Helmet


  • Light weight makes the riding comfortable 
  • The chin bar provides smooth air circulation for comfortable breathing. 
  • Extended sun peaks help to tackle sunlight. 


  • No visor is included 

4. Open Face Helmet 

These kinds of helmets are only capable of protecting the head and skull. It provides no coverage to the face, chin and neck. 

Open Face Helmet 


  • Provides favorable ventilation 
  • Quite lightweight and wider visionary advantages
  • No suffocation feeling
  • Convenient for doing any activity without taking it off


  • Less protective for face and chin injuries
  • Unfavorable for high speed driving 
  • Poor at noise canceling 

5. Half Helmet

These types of helmets are the least protective for your neck, face and chin. Because it only provides coverage to the skull area of the head. It’s more popular among scooter riders.

Half Helmet


  • Provides comfortable riding taste
  • Lightweight and flexible to wear
  • Exclusive ventilation
  • Handy to do any task like eat, drink etc without removing it


  • Less protective for chin and face
  • Inappropriate for harsh weather conditions
  • Requires additional protection for rider

6. Adventure Helmet

These kinds of helmets are somewhat similar to off-road helmets. Additionally, it consists of extended chin bar safeguard as well. 

Adventure Helmet


  • The integrated chin bar works as solid safeguard 
  • Extended sun peaks protect eye from sunlight 
  • Quality sound interment system


  • A bit costly than other types
  • Limited ventilation facility 

How Do I Know My Helmet Size?

To be frank, sizing a motorcycle helmet according to your head shape is a simple task. It’s like buying a perfectly fitted hat for you. Well, to know the measurement of your head, all you need is to have a tailor’s tape. 

Because It’s flexible to wrap the tape around your skull and determine the perfect size for you. While doing so, you should keep some instructions into consideration. 

For example, wrap the tape around your skull and head fully. To be more precise, keep the tape a bit above the ears and around a half-inch above your eyebrows. That’s how you can avail the measurement of your forehead too. 

You can have a friend to assist you to get a more precise measurement. After gaining the measurement, compare that to the size chart. Well, keep in mind that sizing of the helmets may vary among different models. 

How Do I Know My Helmet Size

Even, most of the manufacturers have their own sizing charts based on the models they produce. So, you should check on that too. But for now, we are provided above the most commonly used size chart for buying a motorcycle helmet for adult bike riders.

How Should A Helmet Fit? 

You should find it a bit tighter when you first wear any helmets. Because, the interior inside the helmet will contact your head portion properly. But you must not feel uncomfortable while wearing one. 

Moreover, if you feel restrictive, it may result in pain later. So, your skull should feel flexible and relax enough to wear the helmet. Besides, there shouldn’t be any hot spots to feel any excessive pressure on your face or skull. 

On the other hand, the helmet must not be loose enough that it makes your head move side to side. So, we recommend considering the suggestions given below while buying a fit helmet. Let’s have a look at the motorcycle helmet fitting guide.

  • First wear the helmet, check that it should feel a bit tight at first.
  • Check if the helmet sets evenly on the head and fits with the skull. 
  • To get a decent peripheral vision, check if the eye port of the helmet sets appropriately above the eyebrows. 
  • Put a finger in between your head and helmet interior and check if this easily goes in. If yes, then go for a smaller size. 
  • Sometimes you can change the Interior pads of the helmet for better fitting. So, consider that too while buying one. 

Well, choosing a stylish helmet for yourself is definitely a personal preference. Though motorcycle helmet head shape is the key factor, along with that, we suggest you keep the factors of built-in mechanism, durability, quality and flexibility of the helmet into consideration too. 

Should A Motorcycle Helmet Squeeze Your Cheeks?

Although you’re going to wear a helmet for protection, you need to feel comfy while your head’s inside one. If you feel it too tight or too loose or scratchy when you’re riding your bike, it might spell disaster. 

Always choose a helmet that you’re comfortable in after trying on. Some will say things like, “That helmet looks pretty dope” or “I used to wear that, go for it”. Don’t listen. Go with the appropriate one.

First factor you need to take into consideration is how snug should a motorcycle helmet be. Some are concerned about full face helmets squeezing the cheeks. It’s perfectly normal, rather it is standard to feel the cushions of the cheek pads against your cheeks. If it does, then this is the proper fit for you. You should feel cozy and snug with no vertical and horizontal movements of your head possible. 

Motorcycle Helmet Squeeze

If you feel the helmet is not up to your satisfaction, change it. But don’t just change the brand or the features. Pick the right size. You can even adjust the helmet by putting different cheek pads available. The helmet should firmly sit on your face and cover the entire head precisely.

So, a motorcycle helmet should squeeze your cheeks to let you know that it’s stable and according to your head. It’s alright if it’s a little tight, the lining is bound to loosen up to your comfort soon.

Should It Be Tight Or Loose?

A helmet will protect you from dust, wind, force as long as you wear it. And if you’re going to wear it, it’s going to be for a considerable amount of time. So anything short of a good and perfect fit helmet will only cause problems. 

Too much of anything means not good. A helmet should be bought prioritizing this fact. To find the right size, it is advised to wear it on, engage the chin straps and walk around. 

It should not come off if tried to, nor should it slide on your head. It should also not cramp up your face and head, causing pain and discomfort. If it’s too tight, slight discomfort will turn into pain and a stuck feeling after a few hours of riding. 

Blood circulation might be affected, causing headache and dizziness. If the helmet causes reddish spots or trouble the pressure points, it’s dangerous to put it on to save your life. 

Tight Or Loose

Your hair might hurt, sweat will get stuck, glass frames will break, making you not able to concentrate much on riding. Too loose of a fitting will risk your safety because you can never know how much force you are going to face in case of an accident. 

It might come off at the time of impact. A helmet shouldn’t be big enough to rotate, just enough to put on a smile freely. If it’s easily removable, opt for a smaller size.

How Do I Know If My Helmet Is Too Small?

Buying a helmet that’s too small for you is a big NO. It just ruins the whole purpose of buying one. So how should you know if it’s too small, not your temporary uneasiness?  

How Do I Know If My Helmet Is Too Small

Here’s some quick guides:

  • Wear the helmet on. If you have trouble even putting it on, pick a larger size.
  • No pain, headache or dizziness should be felt while wearing.
  • If it puts hot spots on your pressure points, it’s too small for you.
  • Change your helmet if it feels stuck instead of a gentle push against your head and face.
  • Here’s an easy one. If you can squeeze one or two fingers between the helmet and your jaw/scalp but are unable to twist, then it’s not too tight, but perfect.

One should remember that the correct helmet size depends on the head size, head measurements and the shell size of the helmet. Sometimes the cheek pads or the straps might make it tighter. Tight helmets do loosen up a bit also, so keep that in mind too. The best way to know is to experience it for a few minutes and see how you are feeling. Many manufacturing companies let you have a motorcycle helmet fit test. You can go for that too.

Can You Wear Helmets Over Glasses?

Trouble wearing the helmet with your glasses on, ain’t it the oldest of problems? It is possible, although not as easy as thought. Some opt for contact lenses or astoundingly(!) no helmet, but those come with very problems of their own. So what to do?

To be safe at the fullest, a proper helmet is your best bet. But you also need your glasses. So you should pick both and find the proper combination. You can get glass friendly helmets and wear thin, padded and foamed and close framed glasses if that’s comfortable to you.

Full-face helmets are not the ideal choice if you are to put your glasses on too. The rim might break or the frame might snap, you might feel niggles often and be distracted. Modular or flip-up helmets are the best ones to fit your glasses properly. An open face one will do just good, but leaves much of your face uncovered which can be of a little concern.

Wear Helmets Over Glasses

A convenient helmet should come with features like adequate space with cut-ins to fit the glasses, flexible foam and cheek pads and enough ventilation. Instead of putting the helmet with glasses on, check for a helmet that is good enough to put your glasses on comfortably afterwards. Though both the modular and the open faced ones provide the luxury to do the opposite.

Final Verdict

At this point, you should have already known about the basics of this headwear. The available variations of motorcycle helmets and how you choose your preferred type, how should a motorcycle helmet fit, this much should’ve been made clear. 

Always be aware of your safety and opt for the one which will actually ensure that. Don’t go for the looks, look for quality and adjustment. Purchase your helmet carefully and pick thoroughly if you want to keep that ‘bon voyage’ vibe while setting off.

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