Based on reviews and the website, I ordered down a size. (Depending on the shoe, I'm sometimes an 8W and sometimes 8.5W US.) My feet came right up to the end and my toes were squished. So, I ordered a size up. These are so big that I have to wear extra thick socks so they don't slide off. The buckles on the also sides don't stay put if you try to tighten them, which is almost the most disappointing part. I may yet still order the short boots - I understand they run a bit smaller, so hopefully the size 9 won't be as big as what I ended up with in the tall boots. It's so very difficult to find wide width rain boots, I'm willing to give these a third try. Here's hoping.