I asked on chat which size to go for and you suggested small, as I am UK size 5. They are warm and comfortable (albeit slightly big). I have used them for work, walking and mainly for agility. I would normally have to take 3 or 4 pairs of socks if the weather is wet but my feet lovely and dry. I went for crew socks and are perfect for me.
Due to rubberised type feel of the fabric they don't shape tight to your feet like a conventional sock.