adidas YEEZY Powerphase Sizing: Run Big or Small?

YEEZY Powerphase Sizing, What the Feetlot Database Tells Us

The adidas YEEZY Powerphase is a minimalist retro court trainer, and its fit is more restrained than the chunky Boost-soled models that share the YEEZY name. Across the pairs tracked by Feetlot, the pattern is consistent: the Powerphase sits on the snug side. Based on 50 verified pairs in the Feetlot database, the typical wearer ends up about half a size larger than they would take in a Nike Air Force 1, which is Feetlot's reference shoe. That tracks with how the broader YEEZY line behaves, most of it is bought a half size up, and with the Powerphase's own clean leather build, which holds its shape rather than relaxing into the foot.

Should You Size Up or Down in YEEZY Powerphase?

Standard fit (most people)

Go about half a size up from a true Air Force 1 size. The Powerphase uses a structured leather upper over a low court-style last, so a true-to-size purchase tends to feel short and tight across the toes. Half a size up restores length without the heel slipping, and because the leather does not stretch much in length, that extra room is worth buying rather than waiting for.

Wide feet

Size up half a size, and consider a touch more if the toe box feels close. The Powerphase runs somewhat narrow through the forefoot, so wide-footed wearers feel the snugness first. Per Feetlot data this is the group most likely to wish they had gone up.

Narrow feet

Half a size up still works for most narrow feet, and the trimmer last actually suits them well. A secure midfoot wrap is part of the Powerphase's appeal, and narrow feet get that lockdown without the upper feeling tight.

The broader YEEZY line

The Powerphase is the odd one out in the YEEZY family. According to Feetlot data it runs roomier than the Boost models, the 350 V2, 700 V2, Quantum, and 700 V3 all fit smaller than the Powerphase, so a size that works in those will feel tight here. Buyers cross-shopping within the line should not assume their 350 V2 number carries over.

How YEEZY Powerphase Compares to Other Shoes

According to Feetlot data, the YEEZY Powerphase runs about half a size smaller than the Nike Air Force 1, you would take a larger number in the Powerphase than in the AF1. It also runs slightly smaller than the AF1 High and the Balenciaga Speed.

Against the rest of the YEEZY line the direction flips: the Powerphase runs larger than the YEEZY Boost 350 V2 and the YEEZY Boost 700 V2, both well-tracked in the Feetlot database, meaning you would take a smaller number in the Powerphase than in those Boost models. The same holds against the YEEZY Quantum and the 700 V3.

A handful of recognizable sneakers fit close to the Powerphase. Feetlot data places the Air Jordan 1, Air Jordan 3, adidas Ultraboost 4.0, adidas NMD XR1, YEEZY 700 MNVN, and the Nike Blazer Mid 77 all within roughly a quarter size, so the same size carries over from those.

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

YEEZY Powerphase Size Chart (US / UK / EU)

Common Sizing Mistakes

• Buying true to size because it is a leather trainer. The Powerphase runs snug and slightly narrow, most wearers need about half a size up.
• Carrying over a YEEZY Boost number. The Powerphase fits larger than the 350 V2 and 700 V2, so the size that works in those Boost models will feel tight here.
• Counting on the leather to stretch in length. The upper softens a little around the foot but does not gain length, buy the room you need.
• Ignoring foot width. Wide feet feel the narrow forefoot first and are the most likely to wish they had sized up.

How Feetlot Computes These Numbers

Every YEEZY Powerphase 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 YEEZY Powerphase 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.