United Kingdom Size Super Wide to US: Classic Regular / 53mm

United Kingdom Size Super Wide: Corresponds to a nominal width of 64 $\text{mm}$ (2.52 $\text{in}$), length of 215 $\text{mm}$ (8.46 $\text{in}$), average structural girth of 128 $\text{mm}$ (5.04 $\text{in}$), and fit category Extra Extra Large / Super Wide.

US: Classic Regular / 53mm: 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.