What is a kids size 6 shoes in men's shoes?

it is size 4.5. In the United States, a women's size 6.5 is equal to 9.0625". There is no exact match in children's sizes to this, but the closes would be 9", which is what the 4.5 is in kids'. If this is too small, your next best bet would be a size 5, which is slightly bigger than a women's size 6.5 - 9.125".