Finding a motorcycle helmet when your head measures 60 cm or larger should not be this difficult, yet here we are. Most helmet brands publish a size chart that runs XS through XL, stamp "one shell fits all" padding adjustments on the spec page, and call it a job. That approach produces mushrooming, which is the unflattering silhouette you get when an XL shell is just an XS shell stuffed with extra foam. It looks wrong, fits worse, and in a crash the geometry is off in exactly the way you do not want. This roundup is about helmets that actually scale.
Our research desk cross-referenced rider feedback on large-size fitment from r/motorcycles and ADV forums, size charts across the major brands (Bell, HJC, LS2, ScorpionEXO, ILM), and which models ship with genuine multi-shell lineups or size ranges stretching to 3XL and 4XL. We also looked at certification quality, because a big head deserves real protection: DOT FMVSS 218 is the legal floor, ECE 22.06 is the independent-lab gold standard, and Snell M2025 means a third party actually destroyed samples to verify the numbers. Eight helmets made the cut, covering full-face, modular, and open styles across a range of budgets.
Before the list: measure your head. Wrap a soft tape measure around your skull at the widest point, roughly an inch above the eyebrows. That number in centimeters maps directly to manufacturer size charts, and the charts are the only reliable guide. Do not eyeball it, and do not size up blindly for comfort because a loose helmet shifts in a crash.
Key Takeaways
- A true big-head helmet uses a larger outer shell, not just extra padding. The Bell Qualifier explicitly offers three shell sizes, which is the benchmark for the category.
- Head shape matters as much as head size. Most big-head riders with a round-oval skull fit HJC well; long-oval heads often fit Bell or LS2 better. Measure circumference AND know your oval.
- ECE 22.06 is the only standard where an independent lab actually tests the helmet before it ships. The LS2 Strobe II carries both ECE 22.06 and DOT at sizes up to 3XL.
- The ILM big-head full-face reaches 4XL (67-68 cm), making it the widest size range in this roundup for very large heads.
- Mushrooming (the helmet sitting too high like a top hat) means the shell is too small. Return it and size up the shell, not just the padding.
| Bell Qualifier Full-Face Helmet |  |
Best Overall for Big Heads | Type: Full-face | Certification: DOT FMVSS 218 + ECE 22.06 | Best for: Big-head riders who want proper shell scaling | VIEW LATEST PRICE | Read Our Analysis |
| HJC C91 Modular Helmet |  |
Best Modular for Big Heads | Type: Modular (flip-up chin bar) | Certification: DOT FMVSS 218 | Best for: Touring riders with round-oval heads at 3XL | VIEW LATEST PRICE | Read Our Analysis |
| HJC i10 Full-Face Helmet |  |
Best Full-Face (Snell Certified) | Type: Full-face | Certification: DOT FMVSS 218 + Snell M2020 | Best for: Riders who want Snell-level certification in a big size | VIEW LATEST PRICE | Read Our Analysis |
| LS2 Helmets Strobe II Modular |  |
Best ECE 22.06 Certified at 3XL | Type: Modular (flip-up) | Certification: DOT FMVSS 218 + ECE 22.06 | Best for: Long-oval big-head riders wanting ECE-certified modular | VIEW LATEST PRICE | Read Our Analysis |
| ILM Big-Head Full-Face Helmet |  |
Widest Size Range (up to 4XL) | Type: Full-face | Certification: DOT FMVSS 218 | Best for: Very large heads (3XL-4XL) on a budget | VIEW LATEST PRICE | Read Our Analysis |
| HJC i80 Modular Helmet |  |
Best Comfort Modular (Interchangeable Cheek Pads) | Type: Modular (flip-up) | Certification: DOT FMVSS 218 | Best for: Big-head riders who need pad customization to dial fit | VIEW LATEST PRICE | Read Our Analysis |
| ScorpionEXO Covert 2 Open Face Helmet |  |
Best 3/4 Open Face at 3XL | Type: 3/4 open face (with interchangeable mouth cover) | Certification: DOT FMVSS 218 | Best for: Cruiser riders wanting open-face comfort at big sizes | VIEW LATEST PRICE | Read Our Analysis |
| HJC i31 Open Face Helmet |  |
Best Open-Face for Big Heads | Type: Open face (3/4) | Certification: DOT FMVSS 218 | Best for: Round-oval big heads preferring the HJC fit in open-face | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
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Bell Qualifier Full-Face Helmet
The Bell Qualifier's headline feature for big-head riders is right there in the first bullet: three shell sizes. That means a 3XL Qualifier is not a medium shell crammed with extra foam, it is a shell designed and molded for large heads. Most budget helmets in the big-size range skip this entirely, which is why the Qualifier is the reference point for fit quality in this category.
Certification covers both DOT FMVSS 218 and ECE 22.06, which makes it one of the few helmets at this price point with an independent European lab verify on the same sticker. The Ionic+ anti-odor padding is a practical bonus for anyone wearing a lid daily, since large-head helmets tend to trap more heat.
The fit profile is described as intermediate oval, which sits between round and long. Bell's recommendation is the same as everyone else's: measure and use the chart. If you are right at the boundary between sizes, Bell advises sizing up so the shell, not the padding, is doing the geometry work.
At 3XL this is the most widely available large full-face from a mainstream brand. The ventilation is competent for street riding, the visor deploys smoothly, and the build quality is what you expect from Bell at the mid-tier. For a big-head rider who wants known-good shell architecture without paying premium prices, the Qualifier is where to start.
- Type:Full-face
- Certification:DOT FMVSS 218 + ECE 22.06
- Shell:Three shell sizes (not one-shell padded)
- Size range:XS to 3XL
- Head shape:Intermediate oval
- Ventilation:Channeled venting with intake/exhaust
- Padding:Ionic+ anti-odor, removable/washable
- Best for:Big-head riders who want proper shell scaling
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HJC C91 Modular Helmet
HJC is the brand that serious big-head riders come back to consistently, and the reason is fit geometry: HJC leans round oval, which matches the skull shape most common among larger-headed riders. The C91 extends that reputation into modular territory, with the flip-up chin bar that touring riders reach for at fuel stops and border crossings.
The RapidFire shield system is the kind of engineering decision that matters more in practice than on paper. A large lid going on and off dozens of times a month means the swap mechanism actually gets used, and RapidFire swaps shields in seconds without a screwdriver. The Pinlock-ready HJ-17 visor adds fog resistance for cold-morning commuters.
At 3XL the C91 provides the Advanced Channeling Ventilation System, which uses a front-to-back airflow path that is meaningfully better than the single vent holes found on no-name big-head helmets. The removable, washable liner accommodates the additional wear that comes with larger interior surface area.
The C91 is DOT certified and carries HJC's reputation for reliable quality control at volume. For a big-head rider who wants modular convenience in a brand with a proven fit track record, this is the practical choice. If your head runs long-oval rather than round, Bell tends to fit better.
- Type:Modular (flip-up chin bar)
- Certification:DOT FMVSS 218
- Shell:Advanced polycarbonate composite
- Size range:XS to 3XL
- Head shape:Round oval (HJC house fit)
- Shield:Pinlock-ready HJ-17, RapidFire system
- Ventilation:Advanced Channeling Ventilation System
- Best for:Touring riders with round-oval heads at 3XL
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HJC i10 Full-Face Helmet
Snell M2020 certification means a third-party lab, not the manufacturer, destroyed test helmets to verify the impact performance numbers. That distinction matters when you are choosing a lid you plan to trust at highway speeds. The HJC i10 carries both DOT and Snell at sizes up to 2XL, which is rare at this price in the full-face segment.
HJC's round-oval fit has been consistent across the i-series line, and the i10 follows that pattern. The MultiCool interior is a step up from standard padding in terms of moisture management, which makes a measurable difference on summer rides when the helmet is running warm. The liner removes and washes cleanly.
The size range tops out at 2XL rather than 3XL, which makes the i10 the right choice for large heads in the 59-62 cm range. Riders over 62 cm should look at the C91 or the ILM big-head model below. The i10 is the quality ceiling within the 2XL range.
One practical note: the Snell certification means the foam is designed to manage high-energy impacts, and the internal geometry reflects that. The fit should be snug on first wear and break in over a few sessions. If it feels uncomfortably tight on day one, that is usually correct. If it feels loose, it is the wrong size.
- Type:Full-face
- Certification:DOT FMVSS 218 + Snell M2020
- Shell:Lightweight polycarbonate
- Size range:XS to 2XL
- Head shape:Round oval (HJC)
- Shield:Pinlock-ready HJ-31
- Padding:MultiCool moisture-wicking interior
- Best for:Riders who want Snell-level certification in a big size
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LS2 Helmets Strobe II Modular
ECE 22.06 introduced a rotational energy management requirement that DOT does not include, and the LS2 Strobe II meets it using their proprietary AREM (Advanced Rotational Energy Management) technology. For a 3XL helmet that also carries ECE 22.06, this is the only option in this roundup, which narrows the field considerably.
LS2 generally fits intermediate-to-long-oval heads better than HJC, which skews round. If you have consistently found HJC helmets too tight at the temples, the LS2 fit profile is worth trying. The Kinetic Polymer Alloy shell is LS2's in-house material, described as more energy-managing than standard polycarbonate.
The built-in drop-down sun shield is the convenience feature that converts an ADV or touring rider to a modular helmet. Digging sunglasses out at 70 mph is a nuisance; flicking a sun visor down is not. The Pinlock-ready main shield handles fog for the cold-weather crowd.
For big-head riders who spend time in Europe or who simply prefer the higher certification standard, the LS2 Strobe II is the helmet to buy at 3XL. The quick-release chin strap is a further convenience at stops, and the five-year warranty from LS2 is among the better coverage in the category.
- Type:Modular (flip-up)
- Certification:DOT FMVSS 218 + ECE 22.06
- Shell:Kinetic Polymer Alloy (KPA)
- Size range:XS to 3XL
- Head shape:Intermediate to long oval (LS2 house fit)
- AREM:Rotational energy management (ECE 22.06 requirement)
- Sun shield:Built-in drop-down, Pinlock-ready
- Best for:Long-oval big-head riders wanting ECE-certified modular
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ILM Big-Head Full-Face Helmet
Most helmets in this roundup top out at 3XL, which covers heads up to roughly 64-65 cm. The ILM big-head model goes to 4XL, which is 67-68 cm. If you have been told by multiple brands that you do not fit their size chart, this is the helmet that was designed for you specifically. The product listing calls it an "Ultra Big Head Motorcycle Helmet" without irony.
It ships with a Pinlock30 fog-resistant insert included, which is a practical choice given that cold-air riding produces more fogging at the visor seal. The quick-release buckle removes one of the frustrations of large-size helmet wearing, which is that gloves plus a D-ring is a combination that slows you down every single ride.
The shell is ABS and the certification is DOT FMVSS 218 only. ILM is a budget brand, and the finishing quality reflects the price. This is not a helmet you buy for premium ergonomics or brand prestige. You buy it because it actually fits your head and meets the legal safety floor.
For riders at 65 cm and above who have struggled to find anything on the shelf, the ILM big-head model is the practical solution. Pair it with a replacement if/when your riding budget grows, or use it as a stopgap while waiting on a custom or international order.
- Type:Full-face
- Certification:DOT FMVSS 218
- Shell:ABS
- Size range:XS to 4XL (67-68 cm)
- Head shape:Round to intermediate oval
- Visor:Pinlock30 fog-resistant insert included
- Extras:Eyewear-friendly, quick-release buckle
- Best for:Very large heads (3XL-4XL) on a budget
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HJC i80 Modular Helmet
The detail that separates the HJC i80 from budget modulars in the big-head segment is the interchangeable cheek pad system. HJC makes cheek pads that cross all shell sizes of the i80, so if the standard pads are slightly too thick or thin for your face shape, you can order a different thickness and install it yourself. That is fit customization without returning the helmet.
For big heads specifically, this matters because a larger skull often means a wider jaw or a longer face that does not map cleanly to the standard pad thickness. The ability to tune the cheek fit separately from the shell size is the kind of feature that converts a helmet that is almost right into one that is actually right.
The polycarbonate-ABS blend shell is lighter than a pure ABS construction, and the double-D ring lock is HJC's standard chin security for the modular segment. The Advanced Channeling Ventilation provides adequate airflow for street riding.
The i80 tops out at 2XL rather than 3XL, so it is best for big heads in the 59-62 cm range. Above that, the C91 is the HJC modular that scales further. If fit customization matters more than maximum size, the i80 is the better starting point.
- Type:Modular (flip-up)
- Certification:DOT FMVSS 218
- Shell:Polycarbonate-ABS blend
- Size range:XS to 2XL
- Head shape:Round oval (HJC)
- Cheek pads:Interchangeable across all shell sizes
- Shield:Pinlock-ready HJ-44
- Best for:Big-head riders who need pad customization to dial fit
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ScorpionEXO Covert 2 Open Face Helmet
ScorpionEXO developed their own polycarbonate blend specifically for the Covert shell, and the 3XL variant is one of the few open-face helmets in this category from a mainstream brand rather than a white-label import. The Covert 2 adds an interchangeable mouth cover system, so it can run fully open, with a vented cover, or with a solid cover depending on temperature.
The EverClear SpeedView drop-down sun visor is ScorpionEXO's built-in tinted visor, designed to deploy quickly in changing light. For cruiser riders on long runs where shade and sun alternate, this removes the need to carry sunglasses as a separate item. Speaker pockets are cut large enough for most Bluetooth communication systems.
The DOT FMVSS 218 certification covers the basic legal requirement. ScorpionEXO backs this helmet with a five-year warranty, which is meaningful for a brand that services through established dealer networks rather than anonymous marketplace returns.
The fit profile from ScorpionEXO leans intermediate oval. Riders who have found ScorpionEXO to fit in the past will find the Covert 2 consistent with their expectations. This is the open-face recommendation for 3XL riders who ride cruisers and want wind-in-the-face comfort without giving up quality entirely.
- Type:3/4 open face (with interchangeable mouth cover)
- Certification:DOT FMVSS 218
- Shell:Advanced polycarbonate (ScorpionEXO exclusive blend)
- Size range:XS to 3XL
- Head shape:Intermediate oval (ScorpionEXO fit)
- Sun visor:EverClear SpeedView drop-down tinted visor
- Bluetooth:Ready (speaker pockets for most systems)
- Best for:Cruiser riders wanting open-face comfort at big sizes
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HJC i31 Open Face Helmet
For riders who want the clean HJC round-oval fit geometry in an open-face format (or for anyone who finds full-face helmets feel too enclosed, see our picks for the best motorcycle helmets for claustrophobia), the i31 is HJC's current entry in that segment. The Advanced Channeling Ventilation System moves air front-to-back, which matters more in an open-face than a full, since the reduced internal volume makes warm spots more noticeable.
The Pinlock-ready HJ-43 visor is the practical feature for three-season riders who need fog protection in cooler weather but do not want a modular's full chin-bar weight. The advanced polycarbonate compound HJC uses here is the same structural approach as their full-face lineup, meaning the safety architecture is not compromised by the open-face design.
It tops out at 2XL in the i31 specifically. HJC's open-face lineup does not go to 3XL in this model, so riders above 62 cm should check the ScorpionEXO Covert 2 above. For the 59-62 cm range with a consistent round-oval preference, the i31 is the reliable HJC option.
The removable and washable cheek and crown pads are the maintenance story for this helmet. An open-face worn in summer accumulates sweat at the interior more quickly than a ventilated full-face, so the washable liner is the practical feature that extends the helmet's useful life.
- Type:Open face (3/4)
- Certification:DOT FMVSS 218
- Shell:Advanced polycarbonate compound
- Size range:XS to 2XL
- Head shape:Round oval (HJC)
- Shield:Pinlock-ready HJ-43
- Ventilation:Advanced Channeling Ventilation System
- Best for:Round-oval big heads preferring the HJC fit in open-face
How to Choose a Helmet for a Big Head
Most helmet-buying advice is written for average head sizes, which is not helpful when your circumference starts at 60 cm. Here is what actually matters when you are shopping at the large end of the scale.
Shell Sizes: The One Thing That Separates Real Big-Head Helmets from Padding Hacks
The single most important variable when buying a large motorcycle helmet is whether the manufacturer uses multiple outer shells across their size range or a single shell with padding swaps. A single-shell design stuffed with extra foam produces the mushroom effect: the helmet sits too high on the head, the geometry is wrong, and in a crash the impact energy travels through foam that was not designed for that shell size. The Bell Qualifier is the reference point here because it explicitly builds three different shell sizes. If a manufacturer does not disclose how many shells their size range uses, that is a red flag. Ask or assume it is one.
Head Shape Interacts Heavily With Size at the Large End
Round-oval (wider front-to-back and side-to-side) and long-oval (noticeably longer front-to-back than side-to-side) helmets are not interchangeable, and the fit problem is worse at large sizes because there is more contact area for the mismatch to press on. HJC (including the HJC C91, HJC i10, and HJC i80) leans consistently round-oval. Bell and LS2 (the LS2 Strobe II) tend to fit intermediate-to-long-oval heads better. Know which shape you are before ordering, because returning a 3XL helmet is genuinely inconvenient. The most common big-head return reason on forums is not size, it is oval mismatch. See our guide to best motorcycle helmets for round heads for the full oval breakdown.
Certification Quality at Big Sizes: DOT Is the Floor, Not the Ceiling
DOT FMVSS 218 is self-certified, meaning the manufacturer tests and signs off on their own result. Nobody from the government visits the factory. ECE 22.06 requires an independent laboratory to test samples before the certification is granted. Snell M2025 is even stricter, with a non-profit foundation doing the testing. The HJC i10 carries Snell. The LS2 Strobe II carries ECE 22.06. Both are available at sizes relevant to big-head riders. Paying attention to certification at large sizes matters because budget brands tend to cut corners on both testing and shell construction simultaneously. Learn more about what a modular motorcycle helmet actually certifies to, since modular standards are more complex than full-face.
Measuring Your Head: Do This Before Buying Anything
Take a soft measuring tape and place it around your head at the widest point, approximately one inch above your eyebrows. Take the measurement twice and use the larger number. That centimeter figure maps to the manufacturer's size chart, which is the only thing that tells you which physical shell to order. A 61 cm head is an XL or 2XL depending on the brand, and only the chart tells you which. Most of the frustration around big-head helmets comes from riders who guessed their size rather than measured it.
The Mushrooming Problem: What It Means and How to Fix It
Mushrooming is when a helmet sits visibly too high on the head, like a top hat, instead of sitting with the lower edge near the eyebrows. It usually means the shell is too small, not the padding too thin. The fix is not ordering a different padding kit, it is going up a shell size or switching to a brand with a larger small-size shell. For other adjustments short of replacing the helmet, our guide on how to make a motorcycle helmet fit better covers cheek pad swaps and interior tweaks. Brands that offer 3XL and 4XL options like the ILM big-head full-face exist specifically because the standard market misses a portion of the population. See also our guide on when to replace a motorcycle helmet, since an ill-fitting old helmet should be on that list alongside impact-compromised ones.
Motorcycle Helmet for Big Heads Comparison
| Helmet | Type | Certification | Size range | Best For |
|---|---|---|---|---|
| Bell Qualifier Full-Face Helmet | Full-face | DOT FMVSS 218 + ECE 22.06 | XS to 3XL | Big-head riders who want proper shell scaling |
| HJC C91 Modular Helmet | Modular (flip-up chin bar) | DOT FMVSS 218 | XS to 3XL | Touring riders with round-oval heads at 3XL |
| HJC i10 Full-Face Helmet | Full-face | DOT FMVSS 218 + Snell M2020 | XS to 2XL | Riders who want Snell-level certification in a big size |
| LS2 Helmets Strobe II Modular | Modular (flip-up) | DOT FMVSS 218 + ECE 22.06 | XS to 3XL | Long-oval big-head riders wanting ECE-certified modular |
| ILM Big-Head Full-Face Helmet | Full-face | DOT FMVSS 218 | XS to 4XL (67-68 cm) | Very large heads (3XL-4XL) on a budget |
| HJC i80 Modular Helmet | Modular (flip-up) | DOT FMVSS 218 | XS to 2XL | Big-head riders who need pad customization to dial fit |
| ScorpionEXO Covert 2 Open Face Helmet | 3/4 open face (with interchangeable mouth cover) | DOT FMVSS 218 | XS to 3XL | Cruiser riders wanting open-face comfort at big sizes |
| HJC i31 Open Face Helmet | Open face (3/4) | DOT FMVSS 218 | XS to 2XL | Round-oval big heads preferring the HJC fit in open-face |
DOT vs ECE vs Snell vs MIPS, how to pick the right lid in 60 seconds, and when to replace it. One page, no fluff.
Frequently Asked Questions
What size motorcycle helmet do I need for a big head?
Measure your head circumference with a soft tape measure at the widest point, about an inch above the eyebrows. A big head typically starts at 60 cm and above. That measurement maps directly to the manufacturer's size chart. Do not assume you are an XL or 2XL based on clothing sizes, because helmet sizing varies by brand. Brands like HJC, Bell, LS2, ScorpionEXO, and ILM all publish centimeter-based charts.
What is mushrooming in a motorcycle helmet, and how do I avoid it?
Mushrooming is when a helmet sits too high on the head because the shell is too small for your head circumference. The bottom edge rides up above the eyebrows and the helmet looks like a top hat rather than sitting normally. The cause is almost always a single-shell helmet padded up to accommodate multiple sizes. Avoid it by choosing brands that offer multiple shell sizes across their range (the Bell Qualifier explicitly does), and by sizing to your measured circumference rather than guessing.
Which motorcycle helmets are available in 3XL or larger?
For a very large head (63 cm and above), the ILM big-head full-face reaches 4XL and is the most accessible option on Amazon. For 60-63 cm, the Bell Qualifier at 3XL, HJC C91 at 3XL, LS2 Strobe II at 3XL, and ScorpionEXO Covert 2 at 3XL all work depending on preferred style and oval shape. HJC runs round-oval; LS2 and Bell run intermediate-to-long-oval.
Do full-face motorcycle helmets come in 3XL?
Yes. In this roundup, the Bell Qualifier, HJC C91, LS2 Strobe II, ScorpionEXO Covert 2, and ILM big-head model all come in 3XL. The ILM goes to 4XL. The HJC i10, HJC i80, and HJC i31 in this list top out at 2XL. Always cross-check the specific listing you are ordering, because some 3XL listings are size-specific ASINs.
How do I know if a motorcycle helmet fits correctly?
A properly fitted helmet should sit level with the bottom edge about a finger's width above the eyebrows. The cheek pads should contact your cheeks without pressing uncomfortably. When you try to rock the helmet forward and backward or side to side, it should move your skin with it rather than sliding freely on your head. The helmet should feel snug on first wear; the foam breaks in over a few hours of use. If it feels loose immediately, it is the wrong size. If it is painful after an hour of wear, it may be the wrong oval shape. Our guide on why a helmet hurts your head breaks down the most common pressure-point causes and what to do about them.
