adidas Originals Orion 2 - Nylon Sizing: Run Big or Small?

adidas Orion 2 Nylon Sizing, What the Feetlot Database Tells Us

The adidas Originals Orion 2 - Nylon is a slim retro runner, and that low-volume last shapes how it fits. Across 33 verified pairs in the Feetlot database, the pattern is steady: the Orion 2 runs a touch smaller than the Nike Air Force 1, Feetlot's reference shoe. In practice that means most wearers land right at their usual adidas size, with the half-size-up move reserved for wider or in-between feet. There is no wild-card behavior here, the data points the same direction across owners.

Should You Size Up or Down in the adidas Orion 2 Nylon?

Standard fit (most people)

Buy true to size. The Orion 2's length runs close to standard adidas sizing, just a hair shorter than an Air Force 1. A true-to-size pick gives a secure, runner-style fit with the nylon upper hugging the midfoot. Because the silhouette is built on a slim last, true to size feels snug rather than loose, which is what most wearers want from this shoe.

Wide feet

Go half a size up. The Orion 2's nylon-and-suede upper sits low over the instep and the toe box is narrower than a chunky court sneaker. Wide-footed wearers gain the width they need by taking the next half size, without the upper biting across the forefoot.

Narrow feet

Stay true to size. The slim last already wraps a narrow foot well, so there's no need to size down. The lacing has enough range to cinch the midfoot if you want it tighter.

In-between sizes

Round up. The nylon upper has very little give, so when you fall between two sizes the larger one is the safer call, a snug Orion 2 won't stretch into a roomier one over time the way a leather shoe might.

How the adidas Orion 2 Nylon Compares to Other Shoes

According to Feetlot data, the Orion 2 sizes essentially the same as the adidas Gazelle, Vans Authentic, and the PUMA Suede, owners who have both in the Feetlot database tend to take the same size in each, so carry your number straight across. It runs a little smaller than the Onitsuka Tiger Mexico 66 and the Sperry Top-Sider Authentic Original, meaning wearers tend to take a slightly larger number in the Orion 2 than in those.

Against boots and trainers the gap widens: owners tend to wear a noticeably bigger number in the Orion 2 than in the Clarks Desert Boot, so don't assume your Clarks size transfers. By contrast, it runs slightly larger than the older Nike Free Run+ 3, where wearers tend to size down a touch. As always, these are directional reads from the wardrobe graph rather than a one-to-one promise.

Sign in to Feetlot and add a few of the shoes already owned to get a personal adidas Orion 2 size recommendation calibrated to a real foot.

adidas Orion 2 Nylon Size Chart (US / UK / EU)

Common Sizing Mistakes

• Buying small expecting stretch. The nylon-and-suede upper has very little give; a tight Orion 2 stays tight.
• Carrying over a roomy court-sneaker size. The Orion 2's last is slimmer than a chunky leather sneaker, true to size already feels snug.
• Ignoring foot width. Wide feet should add half a size; the narrow toe box is the most common complaint for those who skip it.
• Assuming boot sizes transfer. Owners tend to take a larger number in the Orion 2 than in shoes like the Clarks Desert Boot.

How Feetlot Computes These Numbers

Every adidas Orion 2 Nylon 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 Orion 2 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.