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

United Kingdom Size 8-E: Corresponds to a foot length of 26.8 $\text{cm}$ (10.55 $\text{in}$), ball width of 10.6 $\text{cm}$ (4.17 $\text{in}$), acceptable ball width range between 10.3–10.9 $\text{cm}$ (4.06–4.29 $\text{in}$), and fit classification Wide (9-2E / EE).

US: 10-D: Corresponds to a foot length of 27.2 $\text{cm}$ (10.71 $\text{in}$), ball width of 10.4 $\text{cm}$ (4.09 $\text{in}$), acceptable ball width range between 10.1–10.7 $\text{cm}$ (3.98–4.21 $\text{in}$), and fit classification Standard Width (10-D / M).