Mizuno Wave Spike Where Can I Find Volleyball Shoes For My Daughter?

Where can I find volleyball shoes for my daughter? - mizuno wave spike

I bought a youth volleyball shoes (Mizuno Wave Spike Jr.) called for my daughter who is a size 4, but they were very small (2 or more inches too small). I fear that the larger 5.5-young is too small, too. We also tested the shoes of women in a small size 6, but they were too big. Where can I find volleyball shoes for my 9-year-old girl?