Nike SB Blazer Sizing Guide: Run Small? (41 Pairs)

Nike SB Blazer Sizing — What 41 Pairs in the Feetlot Database Tell Us

The Nike SB Blazer is tracked across 41 owner-reported pairs in the Feetlot database. That is a smaller sample than the headline lifestyle silhouettes, but the pattern is consistent: the SB Blazer runs about half a size small, with residual variance in line with the typical Feetlot spread of roughly 0.20 to 0.25 size units. The skater word-of-mouth advice to "go up half" lines up with what the data shows.

The reason is in the build. The SB Blazer is the skate-tuned version of the classic Blazer, with a padded tongue and collar for board feel, a reinforced suede-and-leather upper, and a Zoom Air or foam insole that takes up a little extra volume inside the shoe. Those padded internals shorten the usable length slightly, which is why a true-to-size pair tends to feel snug at the toe out of the box.

Should You Size Up or Down in Nike SB Blazer?

Standard fit (most people)

Go half a size up from your true Nike size. The padded skate tongue and collar plus the cushioned insole eat into interior length, so a true-to-size pair runs short at the toe for most wearers. Half a size up gives the toes room while the laces and padded collar still lock the heel in place for skating.

Wide feet

Go half a size up, and consider a full size up if your feet are both wide and high-volume. The SB Blazer last is on the medium-to-narrow side, so wide feet feel the suede upper bite across the forefoot at true to size. The extra half size opens up the toe box without leaving the heel sloppy.

Narrow feet

Stay true to size for a snug, locked-in board feel, or go up half if you want a roomier everyday fit. Narrow feet are the one group that can get away with true to size in the SB Blazer, because the padded interior fills the space that would otherwise leave a narrow foot swimming.

Nike SB Blazer Low, Mid, and variants

The SB Blazer Low and SB Blazer Mid share the same length sizing — pick the same number in either. The Mid adds a taller padded collar that wraps the ankle, but it does not change how much length you need. Most owners report the same half-size-up adjustment holds across both the Low and the Mid.

How Nike SB Blazer Compares to Other Sneakers

The Nike SB Blazer sits close in length to most lifestyle sneakers, with the half-size-small skate fit being the main wrinkle. According to Feetlot data, the SB Blazer fits at essentially the same numerical size as the Air Jordan 1, Vans Authentic, adidas YEEZY Boost 350 V2, Nike Air Max 90, Nike Blazer Mid '77, Air Jordan 4, Nike SB Dunk Low, and Nike Air Max 97. If a wearer takes size 10 in any of those, they take size 10 in the SB Blazer too.

The notable exceptions run the other direction: the Nike Air Force 1, the Converse Chuck Taylor, the adidas Superstar, and the Clarks Desert Boot all fit about half a size bigger than the SB Blazer. That means you would buy half a size smaller number in those models than in the SB Blazer — or, flipped around, when moving from one of those to the SB Blazer you go half a size up. Boot-style models in general run roomy, so size down from the SB Blazer number when buying them.

Sign in to Feetlot and add a few of your other sneakers to get a personalized Nike SB Blazer size recommendation calibrated to your actual foot rather than to the population average.

Nike SB Blazer Size Chart (US / EU / UK)

Common Sizing Mistakes

• Buying true to size out of habit. The SB Blazer runs about half a size small thanks to its padded skate interior. Taking your usual Nike size leaves the toes cramped, especially once the insole settles.
• Sizing the SB Blazer like the Blazer Mid '77. The '77 is a slimmer, retro build that fits at the same numerical size as most lifestyle sneakers, while the SB version's padding pushes you up half. They share a name, not a fit-out-of-the-box feel.
• Going a full size up on standard-width feet. Half a size handles the small-running fit for most wearers. A full size leaves the heel loose, which is the last thing you want for board control.
• Buying small expecting the suede to stretch. The suede-and-leather upper softens and forms to the foot's width over a few sessions, but length does not grow. Too short stays too short.
• Confusing GS with Men's sizes. Grade School (GS) SB Blazers run on a smaller last and top out at 7Y. Men's starts at 7. A "size 7" can mean either — check the box stamp.

How Feetlot Computes These Numbers

Every Nike SB Blazer sizing recommendation on Feetlot is the output of a global offset model fit to over 100,000 owner-reported shoe records. Each shoe gets a single number — its "size offset" — that captures how much its sizing drifts from the reference shoe (Nike Air Force 1). When a Feetlot user provides their size in any tracked sneaker, the model recovers their true foot baseline and recommends the matching SB Blazer size.

This works better than the more common pairwise approach because Feetlot uses the entire wardrobe graph. A YEEZY 350 owner contributes data about how YEEZY fits relative to AF1 owners, which links to SB Blazer owners through the shoes they share. Even when two users own zero shoes in common, the chain of users in between transmits a consistent recommendation. The result: sizing advice that holds up no matter how unusual a wardrobe is.