United Kingdom Size 44 to US: 30

United Kingdom Size 44: Corresponds to a waist size of 110 $\text{cm}$ (44 $\text{in}$), total strap length of 125 $\text{cm}$ (49.2 $\text{in}$), and recommended fit classification Relaxed / Expanded.

US: 30: Corresponds to a waist size of 75 $\text{cm}$ (30 $\text{in}$), total strap length of 90 $\text{cm}$ (35.4 $\text{in}$), and recommended fit classification Standard / Regular.