Europe Size 54 to US: 31

Europe Size 54: Features a waist girth of 97 $\text{cm}$ (38.2 $\text{in}$), inseam length of 84 $\text{cm}$ (33.1 $\text{in}$), rise depth of 29 $\text{cm}$, and hip allowance of 116 $\text{cm}$.

US: 31: Features a waist girth of 79 $\text{cm}$ (31.1 $\text{in}$), inseam length of 79 $\text{cm}$ (31.1 $\text{in}$), rise depth of 25.5 $\text{cm}$, and hip allowance of 97 $\text{cm}$.