I was on the fence about buying these boots because of the fit. I am a half size and they are only available in full sizes. After reading the sizing information (size down for half sizes) and experiencing a week of torrential rain, I decided to buy them.
They shipped to the USA within days, and they fit absolutely perfectly. I'm normally a 7.5, but I ordered the equivalent of a USA 7. What I was not prepared for was the comfort. I live in NYC, and my experience with rain boots is that they rub on your feet, and they are clunky and hard to walk in for a whole day. Not these boots. They have a small profile on the foot, and are supremely comfortable. As comfortable as sneakers! I also love the fact that I can wear them up to my knees with dresses and tights, or rolled down for baggy pants and jeans. If you are unsure, just do it. You will love these boots.