US: 2-W to Europe Size 31

Cross-market children’s footwear width fitting conversion mapping 2-W specifications into 31 for Brannock infant/child grades, M/W/XW sizing indexes, and ball width dimensions.

From Standard & Size

Converted Equivalent

Based on row equivalence: US 2-W | EU 18 | Foot Length 10 cm

Standard cross-walk matching active anthropometric row parameters.

US: 2-W to Europe Size 31 Width Conversion

Analyzing Shoe Width and Fitting Equivalence Across Markets

US: 2-W: Corresponds to a foot length of 10 $\text{cm}$ (3.9 $\text{in}$ ), ball width of 4.8 $\text{cm}$ (1.9 $\text{in}$ ), grade Wide (2E), growth margin 0.6 $\text{cm}$ , estimated age 6-9m, Mondopoint 100 $\text{mm}$ , and fit type Infant Wide (US 2 / Width 2E).

Europe Size 31: Corresponds to a foot length of 19 $\text{cm}$ (7.5 $\text{in}$ ), ball width of 7.3 $\text{cm}$ (2.85 $\text{in}$ ), grade Medium / Standard (D), growth margin 1 $\text{cm}$ , estimated age 8-9y, Mondopoint 190 $\text{mm}$ , and fit type Little Kid Medium (US 13 / Width D).