I wear a lot of water shoes as my crazy hobby is collecting tropical fish. I usually wear 8.5 shoes BUT this company has to order a full size to fit properly so order 9.5. This is a very durable shoe and would fit perfectly if it weren't half a size smaller. However, the snug fit can serve me well when slogging through the mud in search of fish. I would definitely order again with a full size for a better fit.