United Kingdom Size 10-E to US: 7-3A

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: 7-3A: Corresponds to a foot length of 23.8 $\text{cm}$ (9.35 $\text{in}$), ball width of 9 $\text{cm}$ (3.5 $\text{in}$), acceptable ball width range between 8.8–9.2 $\text{cm}$ (3.45–3.6 $\text{in}$), and fit classification Extra Narrow (7-3A / AAAA).