RunSized

Nike Shoe Sizing Guide — Do Nike Shoes Run True to Size?

Based on community reports from 42 runners, here's what you need to know about Nike sizing. We have data on 18 Nike shoe models.

Nike Shoes Sizing Data

ShoeSizingCompare
Nike VaporflyTrue to sizeCompare sizes
Nike PegasusTrue to sizeCompare sizes
Nike PegasusTrue to sizeCompare sizes
Nike AlphaflyTrue to sizeCompare sizes
Nike VaporflyTrue to sizeCompare sizes
Nike Free Run 5.0True to sizeCompare sizes
Nike Zoom FlyTrue to sizeCompare sizes
Nike PegasusTrue to sizeCompare sizes
Nike PegasusTrue to sizeCompare sizes
Nike Zoom FlyTrue to sizeCompare sizes
Nike Air Zoom StructureNo data yetCompare sizes
Nike Air Zoom StructureNo data yetCompare sizes
Nike AlphaflyNo data yetCompare sizes
Nike InvincibleNo data yetCompare sizes
Nike InvincibleNo data yetCompare sizes
Nike React Infinity RunNo data yetCompare sizes
Nike WildhorseNo data yetCompare sizes
Nike WildhorseNo data yetCompare sizes

Nike Sizing FAQ

Do Nike shoes run true to size?

Most Nike shoes run true to size based on community data. Of the 10 models with reports, 10 run true to size, 0 run long, and 0 run short.

Should I size up in Nike?

Nike Pegasus runs true to size across widths. Most Nike running shoes fit true, but the Vaporfly and Alphafly race shoes can feel snug — size up 0.5 if in doubt.

How accurate is this Nike sizing data?

All sizing data on RunSized is sourced from real runners who've worn both a reference shoe and a Nike shoe. We show confidence tiers — more reports means more reliable data. With 42 Nike-related reports, the data gives you a solid starting point.

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