US: S (35–37) to United Kingdom Size 46–48
Cross-market men’s shirt and upper-body conversion mapping S (35–37) specifications into 46–48.

Analyzing Upper-Body Size Equivalence Across Markets
US: S (35–37): Corresponds to a chest width of 88.9–94 (35–37 ), neck collar girth of 36.8 (14.5 ), sleeve length of 83.8 (33 ), and fit style Athletic Slim Fit.
United Kingdom Size 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.
Other Conversions to United Kingdom Size 46–48
US: XS (32–34) → uk-46-48XS (32–34) to uk-46-48
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US: S (35–37) → uk-46-48S (35–37) to uk-46-48
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US: M (38–40) → uk-46-48M (38–40) to uk-46-48
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US: L (42–44) → uk-46-48L (42–44) to uk-46-48
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US: XL (46–48) → uk-46-48XL (46–48) to uk-46-48
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US: 2XL (50–52) → uk-46-482XL (50–52) to uk-46-48
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US: 3XL (54–56) → uk-46-483XL (54–56) to uk-46-48
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