US: 11-6E to United Kingdom Size 8-B

US: 11-6E: Corresponds to a foot length of 31.2 $\text{cm}$ (12.3 $\text{in}$), ball width of 12.4 $\text{cm}$ (4.88 $\text{in}$), acceptable ball width range between 12.1–13 $\text{cm}$ (4.75–5.1 $\text{in}$), and fit classification Ultra-Wide (11-6E).

United Kingdom Size 8-B: Corresponds to a foot length of 26.2 $\text{cm}$ (10.31 $\text{in}$), ball width of 9.9 $\text{cm}$ (3.9 $\text{in}$), acceptable ball width range between 9.6–10.1 $\text{cm}$ (3.78–3.98 $\text{in}$), and fit classification Narrow (9-B / AA).