Women's size 7 in youth converts to 5Y in women. 6Y in women is a 7.5 or 8. A women's 7.5 in kids respectively youth shoe sizes corresponds to a 5.5Y or 6Y.
The largest of our children's sizes (which is a size 5) is around the same as a women's size 7. This makes it easy for children to transition into our adult range as they get older.