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United Kingdom Size 38–40 to US: XL (38–40)

Cross-market men’s underwear and boxer brief conversion mapping 38–40 specifications into XL (38–40).

From Standard & Size
UK
Converted Equivalent
US
XL (38–40)
Based on row equivalence: US XL (38–40) | EU 54–56
Standard cross-walk matching active anthropometric row parameters.
United Kingdom Size 38–40 to US: XL (38–40) Conversion

Analyzing Underwear Size Equivalence Across Markets

United Kingdom Size 38–40: Corresponds to a waist stretch range of 96.5–101.6 cm\text{cm} (38–40 in\text{in}), hip circumference of 111.8 cm\text{cm} (44 in\text{in}), thigh clearance of 63 cm\text{cm} (24.8 in\text{in}), and fit style Relaxed Boxers & Extended Boxer Briefs.

US: XL (38–40): Corresponds to a waist stretch range of 96.5–101.6 cm\text{cm} (38–40 in\text{in}), hip circumference of 111.8 cm\text{cm} (44 in\text{in}), thigh clearance of 63 cm\text{cm} (24.8 in\text{in}), 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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