The average shoe size for a 4 year-old child should be around asize 10 for US sizes.
Girls' Shoe Size by Age Chart:
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15 rows · Determine a Girl's Shoe Size From Her Age Can you actually tell a girl's shoe size from her age? Well, you can never tell the exact shoe size from age (shoe size/ feet size is individual!). How to Use Girls' Shoe Size by Age Chart? First: Find your the age of the kid Then: Use the chart to find the corresponding shoe size. One tip from us to you: If you have to choose between two different sizes, always round up. Shoe Size by Age - Girls: Please remember that all sizes are approximations only. They are not recommended for proper sizing. The average shoe size for a 4 year-old child should be around asize 10 for US sizes. For UK sizes it would be a size 9, a Eurosize 27, and a Japanese size