United Kingdom Size Comfort Large to US: Standard / 52mm

United Kingdom Size Comfort Large: Corresponds to a nominal width of 55 $\text{mm}$ (2.17 $\text{in}$), length of 195 $\text{mm}$ (7.68 $\text{in}$), average structural girth of 110 $\text{mm}$ (4.33 $\text{in}$), and fit category Medium-Large / Comfort.

US: Standard / 52mm: Corresponds to a nominal width of 52 $\text{mm}$ (2.05 $\text{in}$), length of 185 $\text{mm}$ (7.28 $\text{in}$), average structural girth of 104 $\text{mm}$ (4.09 $\text{in}$), and fit category Standard / Regular.