Finally found socks both my kids and I approve of! These are not too thin nor too thick, they're just right. They are thick, just at the ankles, which we appreciate because they hold the socks up. We do not like socks that slide down. Would purchase again.My daughter is four years old. She wears a size 10 shoe. I got her T4 they fit her until we washing them. But she loves him. She’s very picky. She has sensory issues. So I ordered a size medium and large. And she’s been wearing the medium. But they have shrunk a lot now too. So now I had to order the next size extra large and I’m washing them. And they shrink a lot. so I’m glad I ordered such big ones. That way I have them for her for when her feet grows.My REALLY picky daughter is wearing them and loving them. She wouldn't wear ANY socks ever before these arrived. She is 7 - bonus that they shrunk down nicely after a wash but still stretch to fit my older daughters' feet and even mine (although I am a size 6 shoe) since 12 pairs came in a package this is a nice feature.Only socks my daughter will wear. They have a seam but it is much thinner than a traditional sock.Seems well made but too tight around the cuff for my average weight child.The socks are great quality and they fit my 6 year old daughter perfectly. They have great stretch so she will still be able to wear them as her foot grows.This sock is not truly seamless.There is still a seam at the top of the toe area and 2 strings on the inside. A total no go for my sensory kiddo. Sadly he ripped open all the packages or I’d be returning.Have a very fussy 6 yr old grandson. These are the only socks he will wear. Ive tried many others. Ended up not being worn.Buena calidad y durabilidad. LoÚnico malo que por la tela, las manchas de que andan descalzos, no se le quitan. Ya es la segunda vez que los compramos, solo que ya una talla más grande. Valen la pena.