US: 11-W to Europe Size 20
Cross-market children’s footwear width fitting conversion mapping 11-W specifications into 20 for Brannock infant/child grades, M/W/XW sizing indexes, and ball width dimensions.

Analyzing Shoe Width and Fitting Equivalence Across Markets
US: 11-W: Corresponds to a foot length of 17.5 (6.9 ), ball width of 7.4 (2.9 ), grade Wide (2E), growth margin 1 , estimated age 6-7y, Mondopoint 175 , and fit type Little Kid Wide (US 11 / Width 2E).
Europe Size 20: Corresponds to a foot length of 11.5 (4.5 ), ball width of 5.6 (2.2 ), grade Extra-Wide (4E), growth margin 0.6 , estimated age 12-18m, Mondopoint 115 , and fit type Infant Extra-Wide (US 4 / Width 4E).
Other Width Conversions to Europe Size 20
US: 0-W → eu-200-W to eu-20
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US: 0-M → eu-200-M to eu-20
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US: 2-W → eu-202-W to eu-20
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US: 4-XW → eu-204-XW to eu-20
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US: 5-N → eu-205-N to eu-20
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US: 6-M → eu-206-M to eu-20
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US: 7-W → eu-207-W to eu-20
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US: 9-XW → eu-209-XW to eu-20
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US: 10-M → eu-2010-M to eu-20
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US: 11-W → eu-2011-W to eu-20
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US: 12-XW → eu-2012-XW to eu-20
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US: 13-M → eu-2013-M to eu-20
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