US: 9 to Europe Size 40.5
Cross-market men’s footwear, boots, sneakers, and loafers size conversion mapping 9 specifications into 40.5.

Analyzing Shoe Size Equivalence Across Markets
US: 9: Features a foot length of 27 (10.6 ), a recommended range of 26.6–27 (10.5–10.6 ), and fit type Standard Width (D).
Europe Size 40.5: Features a foot length of 25.5 (10 ), a recommended range of 25.1–25.5 (9.9–10 ), and fit type Standard Width (D).
Other Conversions to Europe Size 40.5
US: 6 → eu-40-56 to eu-40-5
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US: 6.5 → eu-40-56.5 to eu-40-5
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US: 7 → eu-40-57 to eu-40-5
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US: 7.5 → eu-40-57.5 to eu-40-5
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US: 8 → eu-40-58 to eu-40-5
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US: 8.5 → eu-40-58.5 to eu-40-5
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US: 9 → eu-40-59 to eu-40-5
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US: 9.5 → eu-40-59.5 to eu-40-5
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US: 10 → eu-40-510 to eu-40-5
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US: 10.5 → eu-40-510.5 to eu-40-5
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US: 11 → eu-40-511 to eu-40-5
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US: 11.5 → eu-40-511.5 to eu-40-5
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