Nike Cortez fits in the same number as Air Max 90, Air Max 97, Nike Dunk Low, adidas YEEZY Boost 350 V2, YEEZY 700 V2, and YEEZY 700 V3 — and about half a size larger in number than Air Force 1, Air Jordan 1, and adidas Superstar. At offset +0.512, Cortez sits above the AJ1/AM90 cluster boundary: same as AM90 and Dunk Low, but not same as AJ1 or AF1. Based on 155 owner-reported pairs in the Feetlot database: if your reference is AM90 or Dunk Low, order true to size. Coming from AF1, AJ1, or Superstar: size up half.
Nike Cortez Sizing — What 155 Pairs in the Feetlot Database Tell Us
The Nike Cortez is among the most-tracked classic running silhouettes in the Feetlot database. Across 155 owner-reported pairs, the residual variance is tight (standard deviation ≈ 0.25 size units). At offset +0.512, Cortez sits above AJ1 (+0.217) and between AM90 (+0.314) and YEEZY 700 V3 (+0.640). The key cluster boundaries from Cortez's position: Air Max 90, Air Max 97, Nike Dunk Low, YEEZY 350 V2, YEEZY 380, YEEZY 700 V2, and YEEZY 700 V3 all round to "same" in 0.5 increments. AF1 (0.000) and AJ1 (+0.217) fall half a size below the rounding threshold — meaning Cortez runs about half a size larger in number than those models.
The padded nylon upper and cushioned midsole of the Cortez fill interior volume more than the flat leather AF1, placing Cortez at offset +0.512 — right at the boundary between the AJ1 cluster and the YEEZY 350 cluster. It rounds to "same" as both the upper end of AJ1/AM90 and the lower end of YEEZY 350 V2.
Should You Size Up or Down in Nike Cortez?
Standard fit — coming from AM90, Dunk Low, YEEZY 350 V2, or YEEZY 700 V2
Order true to size. AM90, AM97, Dunk Low, YEEZY 350 V2, YEEZY 700 V2, and YEEZY 700 V3 all round to the same size as Cortez in 0.5 increments. Same number in all of them.
Standard fit — coming from AF1, Superstar, Stan Smith, or Chuck Taylor
Size up half. AF1, Superstar, Stan Smith, and Chuck Ox run about half a size smaller in number than Cortez. If you wear AF1 in 10, take Cortez in 10.5.
Coming from AJ1, Nike Dunk High, or SB Dunk
Size up half. AJ1 and related models run about half a size smaller in number than Cortez. If you wear AJ1 in 10, take Cortez in 10.5.
Wide feet
Size up half. The Cortez last runs medium width. Half a size up is the standard wide-foot adjustment.
Narrow feet
True to size. The lacing system holds narrow feet well at the correct length.
How Nike Cortez Compares to Other Sneakers
The Nike Cortez fits at the same numerical size as Nike Air Max 90, Air Max 97, Nike Dunk Low, SB Dunk Low, adidas YEEZY Boost 350 V2, adidas YEEZY Boost 380, adidas YEEZY 700 V2, adidas YEEZY 700 V3, and New Balance 574. According to Feetlot data, all of these round to the same size in 0.5 increments.
The shoes that run smaller in number than Cortez (size up half from those): Nike Air Force 1, Air Jordan 1, Air Jordan 4, Nike Dunk High, SB Dunk High, Nike Blazer Mid '77, adidas Superstar, adidas Stan Smith, Converse Chuck Taylor Ox, Converse Chuck Taylor Hi, Vans Authentic, and Sperry Authentic Original. If you wear AF1 or AJ1 in 10, take Cortez in 10.5.
Boot-style models: Clarks Desert Boot, Red Wing Iron Ranger, Chippewa Apache Lacer, and Red Wing Beckman run about a full size smaller in number than Cortez.
Sign in to Feetlot and add a few of your other sneakers to get a personal Cortez size recommendation.
Nike Cortez Size Chart (US / EU / UK)
| US Men's | US Women's | UK | EU |
|---|---|---|---|
| 6 | 7.5 | 5.5 | 38.5 |
| 6.5 | 8 | 6 | 39 |
| 7 | 8.5 | 6.5 | 40 |
| 7.5 | 9 | 7 | 40.5 |
| 8 | 9.5 | 7 | 41 |
| 8.5 | 10 | 7.5 | 42 |
| 9 | 10.5 | 8 | 42.5 |
| 9.5 | 11 | 8.5 | 43 |
| 10 | 11.5 | 9 | 44 |
| 10.5 | 12 | 9.5 | 44.5 |
| 11 | 12.5 | 10 | 45 |
| 11.5 | 13 | 10.5 | 45.5 |
| 12 | 13.5 | 11 | 46 |
Common Sizing Mistakes
- Using AF1 or AJ1 as the reference without adjusting. Both run about half a size smaller in number than Cortez. If you wear AF1 or AJ1 in 10, take Cortez in 10.5.
- Assuming Cortez is in the same bucket as AJ1. Cortez (+0.512) sits above AJ1 (+0.217). They are NOT in the same half-size bucket — the Cortez rounds to the same as AM90/Dunk Low, not AJ1.
- Thinking Cortez fits the same as YEEZY 350 V2. Cortez and YEEZY 350 V2 do round to the same size in 0.5 increments. Same number in both — no adjustment from YEEZY 350 V2 to Cortez.
How Feetlot Computes These Numbers
Every Nike Cortez 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 its sizing drifts relative to a reference shoe (the Nike Air Force 1). The result: sizing advice that holds up no matter how unusual a wardrobe is.