United Kingdom Size Extra Large to US: Snug / 47mm

United Kingdom Size Extra Large: Corresponds to a nominal width of 60 $\text{mm}$ (2.36 $\text{in}$), length of 205 $\text{mm}$ (8.07 $\text{in}$), average structural girth of 120 $\text{mm}$ (4.72 $\text{in}$), and fit category Extra Large / Magnum Custom.

US: Snug / 47mm: Corresponds to a nominal width of 47 $\text{mm}$ (1.85 $\text{in}$), length of 170 $\text{mm}$ (6.69 $\text{in}$), average structural girth of 94 $\text{mm}$ (3.7 $\text{in}$), and fit category Snug / Slim.