US: 40 Regular to Europe Size 46 Regular

US: 40 Regular: Corresponds to a chest girth of 101.6 $\text{cm}$ (40 $\text{in}$), stature length variant Regular (173–180 cm / 5’8”–5’11”), and a trouser drop offset of Drop 6 (waist: 86 $\text{cm}$ (34 $\text{in}$)).

Europe Size 46 Regular: Corresponds to a chest girth of 91.4 $\text{cm}$ (36 $\text{in}$), stature length variant Regular (173–180 cm / 5’8”–5’11”), and a trouser drop offset of Drop 6 (waist: 76 $\text{cm}$ (30 $\text{in}$)).