5
5-6-7-8
FYI, youth sizing is the same as men's sizing. So a youth 3 = a women's 4.5 to 5. Once she's into women's shoes, the sizing will make more sense. I normally wear a women's 7-7.5 but have a pair of kids sneakers (youth size 5) because they're less expensive for the same shoe, same brand. :)
Never knew that, thanks!! :)