US: L (42–44) to United Kingdom Size 50–52
Cross-market men’s shirt and upper-body conversion mapping L (42–44) specifications into 50–52.

Analyzing Upper-Body Size Equivalence Across Markets
US: L (42–44): Corresponds to a chest width of 106.7–111.8 (42–44 ), neck collar girth of 41.9 (16.5 ), sleeve length of 88.9 (35 ), and fit style Comfort 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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