United Kingdom Size 10.5–12.5 to US: 13.5–15
Cross-market men’s sock conversion mapping 10.5–12.5 specifications into 13.5–15.

Analyzing Sock Size Equivalence Across Markets
United Kingdom Size 10.5–12.5: Corresponds to a US shoe size range of 11–13, foot length of 28.5–30 (11.2–11.8 ), and fit classification Relaxed / Comfort Stretch.
US: 13.5–15: Corresponds to a US shoe size range of 13.5–15, foot length of 30.5–32 (12–12.6 ), and fit classification Extended Volume / High Stretch.
Other Conversions to US: 13.5–15
United Kingdom Size 3.5–5 → us-13-5-153.5–5 to us-13-5-15
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United Kingdom Size 5.5–7.5 → us-13-5-155.5–7.5 to us-13-5-15
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United Kingdom Size 8–10 → us-13-5-158–10 to us-13-5-15
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United Kingdom Size 10.5–12.5 → us-13-5-1510.5–12.5 to us-13-5-15
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United Kingdom Size 13–14.5 → us-13-5-1513–14.5 to us-13-5-15
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United Kingdom Size 15–17.5 → us-13-5-1515–17.5 to us-13-5-15
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