United Kingdom Size 46–48 to US: XL (38–40)
Cross-market men’s underwear and boxer brief conversion mapping 46–48 specifications into XL (38–40).

Analyzing Underwear Size Equivalence Across Markets
United Kingdom Size 46–48: Corresponds to a waist stretch range of 116.8–121.9 (46–48 ), hip circumference of 127 (50 ), thigh clearance of 71 (28 ), and fit style Big & Tall Boxers & Briefs.
US: XL (38–40): Corresponds to a waist stretch range of 96.5–101.6 (38–40 ), hip circumference of 111.8 (44 ), thigh clearance of 63 (24.8 ), and fit style Relaxed Boxers & Extended Boxer Briefs.
Other Conversions to US: XL (38–40)
United Kingdom Size 26–28 → us-xl-38-4026–28 to us-xl-38-40
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United Kingdom Size 28–30 → us-xl-38-4028–30 to us-xl-38-40
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United Kingdom Size 31–33 → us-xl-38-4031–33 to us-xl-38-40
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United Kingdom Size 34–36 → us-xl-38-4034–36 to us-xl-38-40
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United Kingdom Size 38–40 → us-xl-38-4038–40 to us-xl-38-40
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United Kingdom Size 42–44 → us-xl-38-4042–44 to us-xl-38-40
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United Kingdom Size 46–48 → us-xl-38-4046–48 to us-xl-38-40
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