United Kingdom Size 9-D to US: 10-D

Cross-market men’s shoe width conversion mapping 9-D specifications into 10-D.

Analyzing Shoe Width Equivalence Across Markets

United Kingdom Size 9-D: Corresponds to a foot length of 27.2 $\text{cm}$ (10.71 $\text{in}$ ), ball width of 10.4 $\text{cm}$ (4.09 $\text{in}$ ), acceptable ball width range between 10.1–10.7 $\text{cm}$ (3.98–4.21 $\text{in}$ ), and fit classification Standard Width (10-D / M).

US: 10-D: Corresponds to a foot length of 27.2 $\text{cm}$ (10.71 $\text{in}$ ), ball width of 10.4 $\text{cm}$ (4.09 $\text{in}$ ), acceptable ball width range between 10.1–10.7 $\text{cm}$ (3.98–4.21 $\text{in}$ ), and fit classification Standard Width (10-D / M).