Despite the unhelpful sizing description and the fact that baby foot sizes are confusing, I hope this review will help other parents like me. I bought "7-8.5" for my daughter. She is 6 years old and wears a youth size 2. (I think this is the second tier of children's shoe sizes). If it helps, her foot measures over 7 inches from toe to heel. These socks fit her perfectly, are easy to put on and don't seem to slip off the heel.
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