My granddaughter is 4 years old and wears between 8-9 shoe size, however it'll make a difference on her height etc.
A 4 year olds shoe size can vary. However, the average shoe size for this age is around sizes 8-10.
Size 2-4
The average shoe size for a 4 year-old child should be around a size 10 for US sizes. For UK sizes it would be a size 9, a Euro size 27, and a Japanese size 16.5.
Between size 8 and 9
usually about size 3 or 4.
Most likely a typical 4 yo girl will wear 9 1/2 to 10 size shoe.
4 1/2
Usually from 4-6.
Normally 10 year old girls are a size 5, but size 4 is normal too
It depend on the brand every brand has different sizes for every type of shoes.
My 3 year old wears sizes 8 or 9
i would say about a size 4-6 (uk sizes)