Nike Shox Turbo+ 13 Sizing: Run Big or Small?, Feetlot Data

Nike Shox Turbo+ 13 Sizing, What the Feetlot Database Tells Us

The Nike Shox Turbo+ 13 is a performance running silhouette with a snug, foot-hugging last, and the Feetlot data reflects that reputation. Measured against the Nike Air Force 1, Feetlot's reference shoe, the Shox Turbo+ 13 runs about half a size smaller. In plain terms: a wearer who is comfortable in a given Air Force 1 size usually needs to go up about half a size in the Shox Turbo+ 13 to get the same room. The direction here is clear and consistent: this is a shoe that runs small, not large.

Because the Shox Turbo+ 13 is an older, specialized running model, it has a modest pool of direct owners in the Feetlot database, 18 verified pairs. That is exactly where Feetlot's offset model matters: rather than relying only on those direct owners, the recommendation is anchored to a global model fit across the entire wardrobe graph, so the half-size-up estimate stays stable even without thousands of direct reports.

Should You Size Up or Down in the Nike Shox Turbo+ 13?

Standard fit (most people)

Go about half a size up from a true Nike size. The Shox Turbo+ 13 uses a performance-running last that is narrower and shorter in feel than a lifestyle sneaker, and the structured heel cradle and Shox columns leave little forgiveness at the back of the foot. Half a size up gives the toes room and lets the midfoot lock in without the upper pinching.

Wide feet

Size up a full size. The Shox Turbo+ 13 was built around a slim athletic foot, so width is its tightest dimension. A full size up buys both the length and the extra girth that wide-footed wearers need, since this upper does not stretch much across the forefoot.

Narrow feet

Half a size up is usually enough, and true to size can work for genuinely narrow feet that want a locked-in race fit. The snug last actually suits narrow feet well, just confirm the toes are not jammed against the front before settling on true to size.

Running vs. casual wear

For active running, the half-size-up fit keeps the heel seated on the Shox columns where it belongs. For all-day casual wear, erring toward the upper end of that range, closer to a full size up, keeps the toe box comfortable once feet swell later in the day.

How the Nike Shox Turbo+ 13 Compares to Other Shoes

According to Feetlot data, the Shox Turbo+ 13 fits close to several familiar Nike sneakers: owners who have both in the Feetlot database tend to take the same size in the Shox Turbo+ 13 as in the Nike Air Max 90, the Nike Air Max 97, and the Nike Free Run+ 3. Casual icons line up here too, the same number works in the Vans Classic Slip-On.

Against the Converse Chuck Taylor and the ASICS GEL-Kayano 18, the Shox Turbo+ 13 runs slightly smaller, so wearers tend to take a touch more size in the Shox. The gap widens against boots and soccer footwear: the Shox Turbo+ 13 runs noticeably smaller than the Clarks Desert Boot, where owners in the Feetlot database tend to take close to a full size more in the Shox. It also runs smaller than the adidas Copa Mundial, a famously tight soccer boot, meaning if a Copa fits, expect to go up in the Shox.

Sign in to Feetlot and add a few of the shoes already owned to get a personal Nike Shox Turbo+ 13 size recommendation calibrated to a real foot.

Nike Shox Turbo+ 13 Size Chart (US / UK / EU)

Common Sizing Mistakes

• Buying true to size out of habit. The Shox Turbo+ 13 runs small; a true-to-size pair often feels short and tight at the toes for most wearers.
• Ignoring width. The narrow performance last is the most common complaint, wide feet should size up a full size, not just half.
• Expecting the upper to break in. The synthetic and mesh upper holds its shape; length and width will not stretch into a fit that started too small.
• Letting the heel float. Sizing too far up so the Shox column heel no longer cradles the foot defeats the cushioning, go up enough for the toes, but no further.

How Feetlot Computes These Numbers

Every Nike Shox Turbo+ 13 sizing recommendation on Feetlot is the output of a global offset model fit to over 100,000 verified shoe records. Each shoe gets a single number, its "size offset", that captures how much its sizing drifts from the reference shoe, the Nike Air Force 1. When a Feetlot user provides their size in any tracked shoe, the model recovers their true foot baseline and recommends the matching Shox Turbo+ 13 size. This works better than a simple pairwise lookup because Feetlot uses the entire wardrobe graph: even when two users share no shoes directly, the chain of users between them transmits a consistent recommendation. That is why a shoe with a modest number of direct owners still gets a stable size estimate.