United Kingdom Size 34 to US: 38

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.

US: 38: Corresponds to a waist size of 95 $\text{cm}$ (38 $\text{in}$), total strap length of 110 $\text{cm}$ (43.3 $\text{in}$), and recommended fit classification Standard / Regular.