Europe Size 45 to US: 30

Europe Size 45: Features a waist girth of 74 $\text{cm}$ (29.1 $\text{in}$), inseam length of 77 $\text{cm}$ (30.3 $\text{in}$), rise depth of 24.5 $\text{cm}$, and hip allowance of 91 $\text{cm}$.

US: 30: Features a waist girth of 76 $\text{cm}$ (29.9 $\text{in}$), inseam length of 78 $\text{cm}$ (30.7 $\text{in}$), rise depth of 25 $\text{cm}$, and hip allowance of 94 $\text{cm}$.