Youth or children’s shoe sizes are known as “Big Kids” sizes. These sizes overlap with the smallest women’s shoe sizes. Big kids sizes run 1.5 sizes smaller than the women’s equivalent. For example, a women’s size 5 is the equivalent of a big kids 3.5. However, boys’ big kids sizes run a bit wider than the average women’s shoe, making them a great option for women with wide feet. Knowing how these sizes convert opens up a whole new world of shoe options.