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

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

From Standard & Size

Converted Equivalent

6-D

Based on row equivalence: US 6-D | EU 36-G | Foot Length 22.5 cm

Standard cross-walk matching active anthropometric row parameters.

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

Analyzing Women’s Shoe Width Equivalence Across Markets

United Kingdom Size 4-D: Corresponds to a forefoot ball width of 8.9 $\text{cm}$ (3.5 $\text{in}$ ), ball width range of 8.7–9.1 $\text{cm}$ (3.42–3.58 $\text{in}$ ), reference foot length of 22.5 $\text{cm}$ (8.85 $\text{in}$ ), and fit classification Wide (6-D).

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).