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US: 9-XW to Europe Size 31

Cross-market children’s footwear width fitting conversion mapping 9-XW specifications into 31 for Brannock infant/child grades, M/W/XW sizing indexes, and ball width dimensions.

From Standard & Size
US
Converted Equivalent
EU
26
Based on row equivalence: US 9-XW | EU 26 | Foot Length 15.5 cm
Standard cross-walk matching active anthropometric row parameters.
US: 9-XW to Europe Size 31 Width Conversion

Analyzing Shoe Width and Fitting Equivalence Across Markets

US: 9-XW: Corresponds to a foot length of 15.5 cm\text{cm} (6.1 in\text{in}), ball width of 7.1 cm\text{cm} (2.8 in\text{in}), grade Extra-Wide (4E), growth margin 0.9 cm\text{cm}, estimated age 4-5y, Mondopoint 155 mm\text{mm}, and fit type Toddler Extra-Wide (US 9 / Width 4E).

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

Other Width Conversions to Europe Size 31

US: 0-W → eu-310-W to eu-31
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US: 0-M → eu-310-M to eu-31
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US: 2-W → eu-312-W to eu-31
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US: 4-XW → eu-314-XW to eu-31
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US: 5-N → eu-315-N to eu-31
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US: 6-M → eu-316-M to eu-31
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US: 7-W → eu-317-W to eu-31
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US: 9-XW → eu-319-XW to eu-31
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US: 10-M → eu-3110-M to eu-31
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US: 11-W → eu-3111-W to eu-31
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US: 12-XW → eu-3112-XW to eu-31
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US: 13-M → eu-3113-M to eu-31
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