US: M (38–40) to United Kingdom Size 35–37

US: M (38–40): Corresponds to a chest width of 96.5–101.6 $\text{cm}$ (38–40 $\text{in}$), neck collar girth of 39.4 $\text{cm}$ (15.5 $\text{in}$), sleeve length of 86.4 $\text{cm}$ (34 $\text{in}$), and fit style Classic Regular Fit.

United Kingdom Size 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.