US: Super Wide (XXL) / 64mm to United Kingdom Size Standard

US: Super Wide (XXL) / 64mm: 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.

United Kingdom Size Standard: 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.