Ordered these used (like new) from amazon warehouse and they are like brand new.  I wear a size 9 and ordered the 10 based on reviews I've read.  They are just a tiny bit big, but that's perfect as I will be wearing thick socks with them.  Super comfy...have been wearing them around the house.  Love that they are only calf height as it makes walking in them much easier than rain boots which come up to the knee.  Very stylish as well...can wear trendy tall socks or leg warmers with them as there is just enough room, but they aren't so wide they look silly.  Perfect!