US: 3XL (46–48) to United Kingdom Size 31–33
Cross-market men’s underwear and boxer brief conversion mapping 3XL (46–48) specifications into 31–33.

Analyzing Underwear Size Equivalence Across Markets
US: 3XL (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.
United Kingdom Size 31–33: Corresponds to a waist stretch range of 78.7–83.8 (31–33 ), hip circumference of 96.5 (38 ), thigh clearance of 55 (21.7 ), and fit style Briefs, Boxers & Boxer Briefs.
Other Conversions to United Kingdom Size 31–33
US: XS (26–28) → uk-31-33XS (26–28) to uk-31-33
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US: S (28–30) → uk-31-33S (28–30) to uk-31-33
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US: M (31–33) → uk-31-33M (31–33) to uk-31-33
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US: L (34–36) → uk-31-33L (34–36) to uk-31-33
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US: XL (38–40) → uk-31-33XL (38–40) to uk-31-33
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US: 2XL (42–44) → uk-31-332XL (42–44) to uk-31-33
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US: 3XL (46–48) → uk-31-333XL (46–48) to uk-31-33
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