US: Medium-Large / 55mm to United Kingdom Size Classic

US: Medium-Large / 55mm: 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.

United Kingdom Size Classic: Corresponds to a nominal width of 53 $\text{mm}$ (2.09 $\text{in}$), length of 190 $\text{mm}$ (7.48 $\text{in}$), average structural girth of 106 $\text{mm}$ (4.17 $\text{in}$), and fit category Standard / Original.