US: XL (46–48) to United Kingdom Size 50–52
Cross-market men’s shirt and upper-body conversion mapping XL (46–48) specifications into 50–52.

Analyzing Upper-Body Size Equivalence Across Markets
US: XL (46–48): Corresponds to a chest width of 116.8–121.9 (46–48 ), neck collar girth of 44.5 (17.5 ), sleeve length of 91.4 (36 ), and fit style Generous Full Fit.
United Kingdom Size 50–52: Corresponds to a chest width of 127–132.1 (50–52 ), neck collar girth of 47 (18.5 ), sleeve length of 94 (37 ), and fit style Extended Plus Fit.
Other Conversions to United Kingdom Size 50–52
US: XS (32–34) → uk-50-52XS (32–34) to uk-50-52
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US: S (35–37) → uk-50-52S (35–37) to uk-50-52
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US: M (38–40) → uk-50-52M (38–40) to uk-50-52
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US: L (42–44) → uk-50-52L (42–44) to uk-50-52
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US: XL (46–48) → uk-50-52XL (46–48) to uk-50-52
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US: 2XL (50–52) → uk-50-522XL (50–52) to uk-50-52
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US: 3XL (54–56) → uk-50-523XL (54–56) to uk-50-52
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