What is the average shoe size for 10 years old boy?

I would say that a size 5 would be small (any less would be unusually small) a size 6 - 7 is normal, and a size 8 - 9 is huge. So the average shoe size of a 10 year old is around 6. People differ though. Don't be worried if a child has a giant foot (size 10 +) or a very small size (3 or less).