US: 3XL to Europe Size 42

US: 3XL: Features a chest width of 132 $\text{cm}$ (52 $\text{in}$), shoulder breadth of 58 $\text{cm}$ (22.8 $\text{in}$), and sleeve length of 101 $\text{cm}$ (39.8 $\text{in}$) 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.