Jefferies SocksLittle Girls' Half-Cushion Seamless Socks (Pack of 6)

I wear a women's size 6 shoe and I'm trying to figure out what size kid's socks to get since adult sizes are "one size fits all"

Pack of six meaning 6 pairs come with each order? Or is it 3pair?

My daughter wears a size 13. She is five yrs old. What size sock do i need to buy?

My daughter is 10 and wears size 4 1/2. I am confused to which size would be best for her. ? Thank you!