United Kingdom Size 46 to US: 36

United Kingdom Size 46: Corresponds to a waist size of 115 $\text{cm}$ (46 $\text{in}$), total strap length of 130 $\text{cm}$ (51.2 $\text{in}$), and recommended fit classification Relaxed / Expanded.

US: 36: Corresponds to a waist size of 90 $\text{cm}$ (36 $\text{in}$), total strap length of 105 $\text{cm}$ (41.3 $\text{in}$), and recommended fit classification Standard / Regular.