US: 5-4A to United Kingdom Size 3-A

Cross-market women’s shoe width conversion mapping 5-4A specifications into 3-A.

From Standard & Size

Converted Equivalent

3-AA

Based on row equivalence: US 5-4A | EU 35-F- | Foot Length 21.9 cm

Standard cross-walk matching active anthropometric row parameters.

US: 5-4A to United Kingdom Size 3-A Conversion

Analyzing Women’s Shoe Width Equivalence Across Markets

US: 5-4A: 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).

United Kingdom Size 3-A: Corresponds to a forefoot ball width of 7.9 $\text{cm}$ (3.1 $\text{in}$ ), ball width range of 7.7–8.1 $\text{cm}$ (3.05–3.2 $\text{in}$ ), reference foot length of 21.9 $\text{cm}$ (8.6 $\text{in}$ ), and fit classification Narrow (5-2A / A).