United Kingdom Size 10-E to US: 8-D

United Kingdom Size 10-E: Corresponds to a foot length of 28.4 $\text{cm}$ (11.18 $\text{in}$), ball width of 11.1 $\text{cm}$ (4.37 $\text{in}$), acceptable ball width range between 10.8–11.4 $\text{cm}$ (4.25–4.49 $\text{in}$), and fit classification Wide (11-2E / EE).

US: 8-D: Corresponds to a foot length of 25.2 $\text{cm}$ (9.92 $\text{in}$), ball width of 10 $\text{cm}$ (3.94 $\text{in}$), acceptable ball width range between 9.7–10.3 $\text{cm}$ (3.82–4.06 $\text{in}$), and fit classification Standard Width (8-D / M).