Nike Air Zoom Pegasus 36 Sizing Guide: Size Up Half? (31 Pairs)

Air Zoom Pegasus 36 Sizing — What 31 Pairs in the Feetlot Database Tell Us

The Nike Air Zoom Pegasus 36 is tracked across 31 owner-reported pairs in the Feetlot database. The fit pattern is consistent with the wider Feetlot population — residual variance sits in the typical 0.20–0.25 size-unit band — so the Pegasus 36 fits a given foot length predictably rather than being a wild card. The data points to the same conclusion runners repeat in reviews: this is a road shoe that runs a touch short, and most people are better off half a size up.

The reason is use-case, not a fault in the last. As a daily road trainer the Pegasus 36 is built for miles, and feet lengthen and swell as a run goes on, so a true-to-size pair that feels perfect in the store can press the toes after a few miles. Half a size up gives the thumbnail of toe room distance runners want without letting the heel slip.

Should You Size Up or Down in Air Zoom Pegasus 36?

Standard fit (most people)

Go half a size up from your true Nike size. The engineered-mesh upper holds the midfoot securely, so the extra half size shows up as toe-box room rather than heel slop. This is the most-recommended adjustment for the Pegasus 36 in the Feetlot data, and it matches how most runners buy a daily trainer.

Wide feet

The standard Pegasus 36 last is medium width with a fairly snug forefoot. Wide-footed runners are usually better served by the wide (2E) version Nike makes for this model than by simply sizing up — going up a full size to chase width leaves the heel loose and the foot sliding forward. If the wide build is not available, half a size up is the compromise.

Narrow feet

Stay true to size, or go up half only if you run long. The Pegasus 36 forefoot is already on the snugger side, so narrow feet get a secure lockdown at the nominal size. If your runs are short, true to size avoids any forefoot slide.

Pegasus 36 Shield and other variants

The weatherized Pegasus 36 Shield shares the same last and length sizing as the standard road shoe — the difference is a water-repellent upper and grippier outsole, not a different fit. The Pegasus 36 Trail is a separate shoe on a trail last with a rock plate and lugged outsole; treat its sizing on its own rather than assuming it matches the road version.

How Air Zoom Pegasus 36 Compares to Other Sneakers

The Air Zoom Pegasus 36 sits close in length to most lifestyle sneakers, with one consistent shift: it runs about half a size small next to the roomier leather models. According to Feetlot data, the Pegasus 36 fits at the same numerical size as Air Jordan 1, Vans Authentic, the adidas YEEZY Boost 350 V2, Nike Air Max 90, Nike Blazer Mid '77, Air Jordan 4, adidas Superstar, the Nike SB Dunk Low, and Nike Air Max 97. If you wear size 10 in any of those, take 10 in the Pegasus 36 as a starting point — though as a running shoe most people still bump that up half a size for the swell room described above.

The notable exceptions run roomier, so you take a smaller number in them. The Nike Air Force 1 and the Converse Chuck Taylor both fit about half a size bigger, meaning you'd buy half a size down from your Pegasus 36 number in those. Boot-style models go the same way — the Clarks Desert Boot fits about half a size larger, so size down half from your Pegasus 36 number when buying it.

Within Nike's own running line, the Pegasus 35 and Pegasus 37 sit essentially on top of the Pegasus 36 for length — if you dialed in a size in either neighbor, carry it straight over. The Pegasus 36 Trail is the one to check separately, since its trail last and protective build can fit differently from the road shoe.

Sign in to Feetlot and add a few of your other sneakers to get a personalized Pegasus 36 size recommendation calibrated to your actual foot rather than to the population average.

Air Zoom Pegasus 36 Size Chart (US / EU / UK)

Common Sizing Mistakes

• Buying true to size because it feels fine in the store. A daily road trainer is judged after miles, not standing still. Feet swell and slide forward on a run, so the true-to-size pair can bruise toenails on a long effort. Most runners size up half.
• Sizing up a full size for room. A full size up leaves the heel loose and the midfoot unlocked, so the foot pistons forward on every stride. Half a size up is the room you want.
• Sizing up instead of buying the wide version. The Pegasus 36 comes in a wide (2E) build. If your forefoot is wide, get the wide last — chasing width by going up in length just makes the shoe long and sloppy.
• Assuming the Trail version fits like the road shoe. The Pegasus 36 Trail is a different last with a rock plate and lugs. Confirm its fit on its own rather than copying your road Pegasus 36 size blindly.
• Expecting the mesh to stretch into your foot. The engineered-mesh upper conforms a little but does not grow in length. Buy the correct length up front.

How Feetlot Computes These Numbers

Every Air Zoom Pegasus 36 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 (the 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 Pegasus 36 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 Air Force 1 owners, which links to Pegasus 36 owners, and so on. Even when two users share zero shoes directly, the chain of users in between transmits a consistent recommendation.