US: XL to Europe Size 42

US: XL: Features a chest width of 116 $\text{cm}$ (45.7 $\text{in}$), shoulder breadth of 52 $\text{cm}$ (20.5 $\text{in}$), and sleeve length of 95 $\text{cm}$ (37.4 $\text{in}$) with built-in layering allowance.

Europe Size 42: Features a chest width of 88 $\text{cm}$ (34.6 $\text{in}$), shoulder breadth of 42 $\text{cm}$ (16.5 $\text{in}$), and sleeve length of 81 $\text{cm}$ (31.9 $\text{in}$) with built-in layering allowance.