The regular crocband I ordered a size up and they fit perfect.  I ordered these a size up too thinking they may have a tighter fit being lined but they seem to fit bigger.  I wear a ladies 10 mens 8 and ordered a ladies 11 mens 9. They will be used for winter slipons around the house and outside to feed the dogs etc for those quick chores if the snow is not to deep, and with socks they may fit great but it is over 100 degrees and I just can't try them with socks yet. :) ts 8/3/2011