US: 38 to United Kingdom Size 30

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.

United Kingdom Size 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.