US: S (35–37) to United Kingdom Size 50–52

US: S (35–37): Corresponds to a chest width of 88.9–94 $\text{cm}$ (35–37 $\text{in}$), neck collar girth of 36.8 $\text{cm}$ (14.5 $\text{in}$), sleeve length of 83.8 $\text{cm}$ (33 $\text{in}$), and fit style Athletic Slim Fit.

United Kingdom Size 50–52: Corresponds to a chest width of 127–132.1 $\text{cm}$ (50–52 $\text{in}$), neck collar girth of 47 $\text{cm}$ (18.5 $\text{in}$), sleeve length of 94 $\text{cm}$ (37 $\text{in}$), and fit style Extended Plus Fit.