They are quite pricey, at 3.50 per pair, but considering, that they are made mainly from organic cotton, and are seamless, that is to be expected. Boy and girl versions are totally the same. Socks are on the thinner side, nicely made, and my son accepted them, despite, that they do have tiny bumps on the sides where toe line is. If he is happy with them - I am happy.
  We had before athletic Jefferies socks, which were accepted too-although they were very hard to put on, and these socks are very easy), but their largest size on amazon 9-11 became too small(he wears size 5.5 -6 shoes and is 9 years old). Label says, that this size 10-12 meant to be worn with size 9-13 shoes, but it is clearly not the case. I think Jefferies socks tend to run small. I tried it on my foot(size 9-10 womens), and while I can put it on, it feels too confined, and that is before washing. For my son they seem to be slightly large, but, I am sure will fit just right after wash, and I am not going to risk to put them to the dryer.
  I will update my review in a few months with washing and lasting aspects.