Do Brooks Shoes Run Big or Small?

What the Feetlot Data Says About Brooks Sizing

Based on 332 owner-reported pairs across 32 Brooks models in the Feetlot database, Brooks lands about half a size small. The central tendency is a clear lean toward running shorter than the Nike Air Force 1, the reference shoe Feetlot uses as its baseline. In plain terms, the typical Brooks model comes up around half a size smaller than that baseline, which is why so many runners reach for a half size up, particularly in the road-cushioning and stability lines that make up most of the brand.

The more useful finding, and the one no generic size chart can give you, is consistency, and here Brooks scores moderate. Most of the lineup clusters tightly around that half-size-small mark, while a couple of models pull harder or sit closer to true. So Brooks averages half a size small, yet a single blanket number will still mislead you on a handful of shoes; start from the half-up default and check the specific model below before you commit.

It helps to know why the half-up rule fits this brand so well. Brooks is a road-running specialist, and runners deliberately want a little extra length so the toes can splay and the foot can swell over the miles. A shoe that feels dead-on true in the store often feels short at mile ten, which is exactly the gap the half size up closes.

Which Brooks Shoes Run Big, and Which Run Small

The clearest message in the Feetlot data is how little Brooks varies: almost every popular model runs about half a size small, and none run genuinely big. The real split is between the large group that wants a half size up, one model that runs true, and one that pulls a full size short.

Brooks models that run small (size up about a half size)

This is the bulk of the lineup and the most-owned group in the data. The flagship neutral cushioning Ghost 5 is the single most-owned Brooks model in the Feetlot database and runs about half a size small, making it the cleanest benchmark for the brand. The stability workhorse Adrenaline GTS 12, the earlier Adrenaline 9, and the older neutral Ghost 4 behave the same way. The trail-leaning Cascadia 7, the max-support Dyad 7, and the motion-control Addiction 10 all come up roughly half a size short too, as do the lighter and retro entries: the Ravenna 3, the minimal PureFlow, and the premium-cushion Glycerin 10. The half-up call holds right across the road range.

Brooks models that run true to size

One model breaks toward true. The Beast, the brand's heavy-duty motion-control shoe, runs true to size in the Feetlot data rather than short. If the Beast is your reference, take your normal size and resist the urge to add the half that the rest of the lineup wants.

The Brooks model that runs the smallest

At the far end, the lightweight Launch runs about a full size small, the snuggest fit in the Brooks data. Treat it as a size-up-one shoe rather than a half, because its trimmer, faster-feeling last gives up the most length, the clearest example of why the brand-wide half-up rule has limits.

The through-line is reassuring: outside the true-fitting Beast and the very snug Launch, Brooks is remarkably even, so once you learn your half-up offset in one road model it carries cleanly to the next.

How to Find Your Brooks Size

Because Brooks consistency is moderate, default to half up, then adjust for the two exceptions and for your foot shape.

• Road cushioning and stability (Ghost, Adrenaline GTS, Glycerin, Dyad, Addiction, Ravenna, PureFlow): Size up a half size from your everyday sneaker size. These run about half a size small, and the extra length pays off as your feet swell and your toes splay over a run.
• The Launch: Size up a full size. It runs the smallest of any Brooks model in the data, so a half will leave you short at the toes.
• The Beast: Stay at your true size. It is the one model that fits true rather than short, so the half-up move would leave it too long.
• Wide feet: Brooks is one of the better mainstream brands for width because the road models come in B, D, 2E, and 4E widths. Choose the wider variant before sizing up, since chasing width with a full size up distorts the length and lets the heel slip.
• Narrow feet: A snug-running brand works in your favor. Keep the half-up length, pick the B width, and lace with a heel-lock to lock the midfoot.
• Measure first: Measure both feet in the evening, in centimeters, match to the Brooks chart below fitting the larger foot, then pair that with the half-up offset.

Brooks vs Other Brands

Against the major brands, Brooks sits squarely with the running specialists on length. Compared with Nike, Brooks fits about the same on average in the Feetlot data, so if you wear a size 10 in Nike you wear about a size 10 in Brooks as a starting number, then apply the half-up running adjustment. Brooks and New Balance also fit about the same on average, which makes them easy to cross-shop, with both offering strong width options. ASICS, the other cushioning specialist, likewise fits about the same as Brooks on average, so a runner moving between the two can largely keep the same number and lean on the half-up habit in either.

The casual and lifestyle brands run roomier by comparison. Adidas fits about half a size bigger than Brooks, so at the same labeled size an adidas shoe feels longer, which means you would buy half a size smaller in adidas to match your Brooks fit. Vans and Converse follow the same pattern, each running about half a size bigger-fitting than Brooks. The summary: against another running brand, Brooks is in the same neighborhood; against a casual sneaker like Vans or Converse, expect Brooks to feel about half a size shorter.

Brooks Size Chart (US / UK / EU)

Standard Brooks men's conversion. Measure your foot length in centimeters, match to the nearest size, and apply the half-up running adjustment above.

For Brooks women's sizing, subtract roughly 1.5 from the US men's number. EU and centimeter values stay the same for a given foot length. Width runs B, D, 2E, and 4E on most road models.

How Feetlot Measures This

Feetlot fits a global offset model to more than 100,000 owner-reported shoe records. Each shoe gets a single number that captures how its fit drifts from the reference shoe, the Nike Air Force 1. Aggregating those numbers across every model in a brand reveals the brand's overall pattern, how consistent it is, and which models break from it, which is how the Brooks half-size-small read and the Launch and Beast exceptions surfaced from the data rather than from opinion. To get a personal recommendation in any Brooks model, sign in and add the shoes you already own and how they fit, and Feetlot will translate your real fits into a predicted size.