US: M to Europe Size 44

US: M: Features a chest width of 100 $\text{cm}$ (39.4 $\text{in}$), shoulder breadth of 46 $\text{cm}$ (18.1 $\text{in}$), and sleeve length of 87 $\text{cm}$ (34.3 $\text{in}$) with built-in layering allowance.

Europe Size 44: Features a chest width of 92 $\text{cm}$ (36.2 $\text{in}$), shoulder breadth of 44 $\text{cm}$ (17.3 $\text{in}$), and sleeve length of 83 $\text{cm}$ (32.7 $\text{in}$) with built-in layering allowance.