Europe Size 30 to US: 0-W

Cross-market children’s footwear width fitting conversion mapping 30 specifications into 0-W for Brannock infant/child grades, M/W/XW sizing indexes, and ball width dimensions.

From Standard & Size

Converted Equivalent

12-XW

Based on row equivalence: US 12-XW | EU 30 | Foot Length 18.5 cm

Standard cross-walk matching active anthropometric row parameters.

Europe Size 30 to US: 0-W Width Conversion

Analyzing Shoe Width and Fitting Equivalence Across Markets

Europe Size 30: Corresponds to a foot length of 18.5 $\text{cm}$ (7.3 $\text{in}$ ), ball width of 8 $\text{cm}$ (3.15 $\text{in}$ ), grade Extra-Wide (4E), growth margin 1 $\text{cm}$ , estimated age 7-8y, Mondopoint 185 $\text{mm}$ , and fit type Little Kid Extra-Wide (US 12 / Width 4E).

US: 0-W: Corresponds to a foot length of 8.5 $\text{cm}$ (3.3 $\text{in}$ ), ball width of 3.8 $\text{cm}$ (1.5 $\text{in}$ ), grade Narrow (B), growth margin 0.5 $\text{cm}$ , estimated age 0-3m, Mondopoint 85 $\text{mm}$ , and fit type Infant Narrow (US 0 / Width B).