United Kingdom Size 3-AA to US: 7-4A

United Kingdom Size 3-AA: Corresponds to a forefoot ball width of 7.6 $\text{cm}$ (3 $\text{in}$), ball width range of 7.4–7.8 $\text{cm}$ (2.9–3.1 $\text{in}$), reference foot length of 21.9 $\text{cm}$ (8.6 $\text{in}$), and fit classification Extra Narrow (5-4A / Slim).

US: 7-4A: Corresponds to a forefoot ball width of 8 $\text{cm}$ (3.15 $\text{in}$), ball width range of 7.8–8.2 $\text{cm}$ (3.05–3.25 $\text{in}$), reference foot length of 23 $\text{cm}$ (9.05 $\text{in}$), and fit classification Extra Narrow (7-4A / Slim).