I had read reviews that these Cushe boots ran large, but after a few tries, I ended up with the size 8 and they fit me perfectly (I wear size 9 in most shoes, sometimes 8.5). Now, I'm very happy with them. I've been trekking around in the slush and mud and they keep my feet dry. They are taking a little bit to get broken in and they aren't super warm, but for casual wear, I love them.
This boot is actually very comfortable with each step you take. It does run long, something I was not aware of at the time of purchase. I normally wear between 8.5 and 9. I ordered a 9. It was too long even with thick socks.
This is my second pair, I have a high arch and I can wear this sandal for hours without any discomfort. Only wish they came in narrow for those of us with a narrow width, but they are really great.