Nike sizing is not one-size-fits-all — literally. Different models are built on different lasts, and the difference between a perfect fit and a painful one is knowing how each popular silhouette actually runs. Here is the model-by-model reality.
The golden rule
Measure your foot in centimeters and compare against Nike's size chart — it beats guessing every time. Shop or measure late in the day when feet are at their largest, and always account for the socks you will actually wear. Between sizes with no other guidance? Go up. A slightly roomy shoe can be fixed with lacing; a short shoe cannot be fixed at all.
Model by model
Dunk Low: true to size, slightly narrow. Air Force 1: true to size and wide-friendly — the roomiest of the classics. Jordan 1 High: true to size but snug in the toebox; wide feet go up half a size. Jordan 1 Low: true to size, sleeker than the High. Blazer Mid: narrow — wide-footers should go up half a size. Air Max 90: true to size. Air Max 95: snug, especially the TN-like neoprene collar — half up is common. Air Max Plus (TN): snug; half up for comfort. Pegasus: true to size. Vomero 5: true to size. P-6000: runs slightly small; half up recommended. Cortez: narrow; half up for wide feet. Killshot 2: narrow; half up is the standard advice.
When in doubt
Leather sneakers barely stretch, knit and mesh give more. If a shoe is tight in the toebox on day one, it will still be tight in month three — size up instead of hoping. And remember that half a size is only about 4 millimeters: it fixes snugness without making the shoe sloppy.
Related: Shop the Nike SB Arts & Rec Dunk Low
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