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Both are Nike models, but lasts differ. Dunk Low is labeled True to Size (True to size; half up if wide). Cortez is Runs Small (Size up half a size — especially if average-to-wide feet).
Dunk Low is a common TTS Nike reference — closer and more tapered than Air Force 1. Average feet take their usual size; wide feet may prefer half up. Do not copy an AF1 size-down into Dunks without checking.
Nike Cortez commonly runs short and narrow versus modern sneakers. Most wearers size up half a size; wide feet may still feel squeezed. Narrow feet can sometimes stay TTS for a locked vintage fit. Recent Cortez updates stay true to that slim heritage last.
Use the table below as a starting point from fit offsets — then confirm with try-on or returns. Width can matter more than length between these two.
| Dunk Low | Cortez | |
|---|---|---|
| Verdict | True to Size | Runs Small |
| Advice | True to size; half up if wide | Size up half a size — especially if average-to-wide feet |
| Width | More tapered than AF1 — can feel snug in toebox | Heritage narrow last; toe box is snug and does not stretch much |
| Break-in | Minimal | Minimal length change; leather softens slightly but stays slim |
| Fit offset | +0 | +0.5 |
| Confidence | high | high |
If the left model fits at the listed size, start here in the right model (chart + fit offsets).
| If Dunk Low fits | Try Cortez | Note |
|---|---|---|
| US 7 | US 7.5 | offset +0.5 |
| US 7.5 | US 8 | offset +0.5 |
| US 8 | US 8.5 | offset +0.5 |
| US 8.5 | US 9 | offset +0.5 |
| US 9 | US 9.5 | offset +0.5 |
| US 9.5 | US 10 | offset +0.5 |
| US 10 | US 10.5 | offset +0.5 |
| US 10.5 | US 11 | offset +0.5 |
| US 11 | US 11.5 | offset +0.5 |
| US 12 | US 12.5 | offset +0.5 |
Check prices: Dunk Low Cortez (paid link)
Full Dunk Low guide · Full Cortez guide · Reverse compare · Open in converter