These socks are thin and cool as I hoped they would be, they are also kind of small.  I wear a size 8 1/2 M ladies shoe size and these socks just barely fit me.  I will probably try looking for another brand of bamboo socks when I reorder.  OK, for those who liked these but found them to be too small.  I ordered the men's bamboo socks from the same company at the same price here on Amazon, they fit me great!