There are more than forty helmet rankings and comparisons on this site, and more than twenty separate explainers covering sizing, head shapes, shell sizes, shell materials, certification, types, MIPS and replacement intervals. What there has not been, until now, is a page that puts those decisions in the order a buyer actually has to make them. That order is the whole value of this page, because the common way to buy a helmet badly is to make the decisions in the wrong sequence — to fall for a paint scheme, then a price, then discover the brand does not build a shell your head fits.
One structural note before the list, because it explains why this guide is ordered differently from our jacket and glove guides. For riding gear, the printed certification comes first, because an uncertified jacket is genuinely common and the class is the only claim on the page that someone outside the company tested. Helmets are the opposite: every helmet legally sold for street use in the United States already carries DOT. Certification still matters a great deal — there are real differences between the programs and we will get to them — but it does not sort the market the way it does for jackets. Fit does. So fit comes first here, and that is a deliberate inversion rather than an oversight.
Decision one: the type, because it decides what gets covered
Everything else on this page is a refinement. This one is a different helmet. There are five types and they are not substitutes:
Full-face covers the whole head including the chin and jaw, and it is the quietest and most aerodynamic type because the shell is one uninterrupted piece. If you have no specific reason to want something else, this is the answer, and our full-face ranking is the broadest one we publish. Modular (also called flip-up) is a full-face with a hinged chin bar, bought by touring riders, commuters in traffic, riders who wear glasses and anyone who wants to talk without taking the helmet off. It costs you weight and adds a mechanism. Adventure helmets add a peak and goggle compatibility for dirt roads, usually with more ventilation and more wind noise at highway speed. Open-face (three-quarter) and half helmets give you airflow, peripheral vision and the feeling most riders are actually buying — and nothing at all over the chin and jaw.
Two things worth being honest about. First, the open-face decision should be made deliberately, not by default: our open-face versus full-face page lays out what the certifications do and do not say about the difference. Second, the type you choose constrains every later decision. If you want a drop-down sun visor, for instance, you have already ruled out almost every premium full-face made — a pattern we document in our sun-visor ranking. Our helmet types guide covers all five properly.
Decision two: your head shape, because it eliminates brands
This is the decision riders skip and then pay for every single ride. Human skulls are not all the same shape in plan view: some are longer front-to-back (long oval), some are closer to circular (round oval), and most sit between the two (intermediate oval), which is what the majority of helmets are built around. A helmet built for the wrong shape does not become right with time. It presses on your forehead and the back of your skull, or on the sides, and that pressure point is still there on day ninety.
You cannot correct for shape with size. Going up a size in a helmet built for the wrong shape gives you a helmet that is both the wrong shape and too loose, which is worse than where you started. What you do instead is find your shape, then shop the makers that build it — which is why this decision comes before brand and long before price. As a starting point rather than a rule, Arai is the brand most associated with a rounder fit, while Shoei, AGV, HJC and most mainstream makers build primarily for intermediate oval — though shape varies model to model even inside one brand, and the helmets in our own registry that publish a shape at all overwhelmingly publish intermediate oval. Our head shapes guide explains how to identify yours from a photograph taken directly above your head, and lists which makers build which.
The practical version of this advice: go to a shop and try on helmets from three different makers in your measured size, with no intention of buying that day. The one that presses nowhere is the shape you are. That twenty-minute errand is worth more than every spec sheet on this site.
Decision three: the certification you are actually buying
Now that fit has narrowed the field, this is where you decide what you want tested. The three marks you will see are not three grades of the same thing; they are three different enforcement models, and the difference between them is more interesting than the difference between their test numbers.
DOT (FMVSS 218) is the United States legal minimum. Crucially, it is self-certified: the manufacturer tests to the standard and applies the sticker, and NHTSA conducts its own audit testing separately rather than approving each model in advance. Every street-legal helmet sold here has it, which is precisely why it does not help you choose.
ECE 22.06 is the current European regulation, and it is type-approved: an authority tests and approves the model before it can be sold. It is also the only one of the three that requires oblique-impact testing, which is the rotational-force scenario that most real crashes involve — a genuinely meaningful addition over the superseded 22.05, as our 22.06 versus 22.05 page explains. Not every helmet sold in the US publishes an ECE rating at all, even when the same model is sold in Europe with one.
Snell is a voluntary private standard from an independent nonprofit. Its distinguishing feature is enforcement: Snell buys certified helmets from retail shelves and re-runs the tests, so a maker cannot pass with a hand-built sample and then ship something else. There are no Snell levels — a helmet passes or it does not — which means the badge cannot rank helmets against each other. Our do I need a Snell helmet page covers when paying for it is genuinely the wrong call, and the helmets that carry one is the list.
You may also see SHARP star ratings, a British government-funded program that crash-tests helmets independently and scores them out of five — useful comparative data with a real caveat for American buyers, which our SHARP page covers. And you will see MIPS and similar brand-named rotational systems, which are engineering features rather than certifications; MIPS explained describes what the layer actually does.
The honest summary: if you want the most thoroughly tested helmet, look for one that publishes ECE 22.06 and Snell together, which is rare. If you want the most for your money, DOT plus ECE 22.06 is available cheaply. And if a listing gets vague about certification — “meets safety standards” with no named mark — treat that as the answer it is. Our safest helmets ranking sorts the whole registry on the published stack.
Decision four: the size, and the shell count behind it
Measure first: a soft tape around the widest part of your head, roughly an inch above the eyebrows. Then read the chart for that specific model, because a letter size is not an industry standard — in our own registry, one helmet charts Medium at 57–58 cm while another model’s size run starts at 52 cm, and the same rider is genuinely different letters in different brands. Our sizing guide walks the measurement and the chart-reading in detail.
A correctly sized new helmet is tighter than people expect. The cheek pads should press your cheeks, the liner should move your scalp when you rotate the helmet with both hands, and there should be no single point of pressure anywhere. It should not rotate independently of your head, and with the strap fastened you should not be able to roll it forward off your skull. What it should not have is a hot spot on your forehead — that is the head-shape problem from decision two, not a size problem, and no break-in period fixes it. How tight should a helmet be covers the difference between correctly snug and genuinely too small, including what changes in the first week and what does not.
Then there is the spec most listings bury: how many outer shells the maker tooled. A helmet sold in six letter sizes might be built on one, two, three or four shells, with the remaining sizes made by varying interior padding thickness. At the ends of a size run that matters a lot — an XS on a one-shell helmet is a large shell padded down, and a 2XL is a shell stretched thin. Helmet shell sizes explains how to find the number for a model you are considering, and why four shells is a real premium rather than a marketing one. Related: shell materials covers what polycarbonate, fiberglass composite and carbon actually do differently.
Decision five: the hardware you touch every ride
By this point the field is narrow, and the remaining differences are the ones you will live with daily. In rough order of how often you will notice them:
The shield and whether a Pinlock insert is in the box. This is the one we would spend on first. A Pinlock insert is a second lens that seals to the shield and creates an air gap, and it is the only thing that reliably stops a shield fogging — see how to stop a helmet fogging. Watch the wording, because “Pinlock-ready” and “Pinlock included” are different purchases and most helmets at every price point are the former.
Weight. The spread across our registry is wide — more than 500 g between the lightest full-face we list and the heaviest modular — and it is the spec you feel on hour three rather than minute one. Our lightest helmets ranking sorts on published figures, with the caveat that makers rarely state which size they weighed.
A sun visor, if your light changes mid-ride. A drop-down tinted panel is one finger and one second against stopping to swap a shield. The catch, which decides shopping more than it should, is that most premium full-face helmets do not have one at all: the sixteen helmets we list that do are mostly modular.
Comms, if you want it. Some helmets are tooled with a channel and speaker pockets for a specific intercom, which is a flush install rather than a clamp; others are simply deep enough to take a universal kit. If an intercom is in your plans, decide that now rather than after, and read our intercom ranking.
Vents and liner. Vents you can find and operate with winter gloves on, and a fully removable, washable liner — which is both a hygiene feature and a fit one, since some makers sell cheek pads in multiple thicknesses so you can fine-tune. And if noise is your priority, how to reduce wind noise is worth reading before you buy rather than after, because the biggest variable is not the helmet.
Decision six: the budget, which has mostly answered itself
Price comes last because by now it is a consequence rather than a choice. You know your type, your shape, the certification you want and the hardware you need; the shortlist is short. What is worth knowing is what the money actually buys, and the answer is not “safety” in any simple sense. In our registry the cheapest helmet carrying a current Snell rating sits well under $200, while several helmets at three or four times that price publish DOT alone.
What the extra money reliably buys: composite shell construction instead of polycarbonate, lower weight, more shell sizes, better shield mechanisms, quieter aerodynamics, longer size runs and replaceable liners. Those are comfort, fit and longevity features — and comfort is not a luxury when the question is whether you will wear the helmet on a hot afternoon. How much a helmet costs breaks the bands down, and our budget ranking is where to start if the number is the constraint.
Two final pieces of advice that are not about money. Buy new, or at least buy with provenance: a helmet’s protective foam is a one-impact structure and you cannot see whether a used one has had its impact, which our used-helmet page covers unsentimentally. And know the replacement interval before you spend, because a helmet is a consumable: when to replace a helmet explains the five-year guidance, what ages and why, and how to check a helmet’s age shows you how to read the date stamp on the one you are about to buy — which is worth doing on a discounted helmet before the discount convinces you.
If this is your first helmet and you would rather be handed a shortlist than a framework, start with our starter helmet guide or the beginner ranking, both of which apply exactly the criteria above. And here is how we assess helmets — we own none of them, we run no lab, and every spec we publish is read from a maker’s or retailer’s own page on a recorded date.