US: 48 to United Kingdom Size 34

US: 48: Corresponds to a waist size of 120 $\text{cm}$ (48 $\text{in}$), total strap length of 135 $\text{cm}$ (53.1 $\text{in}$), and recommended fit classification Extended / Plus.

United Kingdom Size 34: Corresponds to a waist size of 85 $\text{cm}$ (34 $\text{in}$), total strap length of 100 $\text{cm}$ (39.4 $\text{in}$), and recommended fit classification Standard / Regular.