I've started buying these about every six months. If you're not familiar with crocs, they don't do half-sizes, you should order up. I normally wear a 7 1/2, with Crocs I wear an 8.
These shoes are incredibly comfortable. With the shoes I used to buy for work, I used to destroy them by the 3 month mark by walking around the office, and by six months, they needed to be trashed. With these, the only reason I need to replace them is because they're no longer comfortable. But wearing them everyday, I can't destroy the soles at all, which was an exciting discovery - I basically only wear these nowadays. The grippy soles keep me from slipping in the snow, the waterproof material stands up to all kinds of weather/conditions. If they do get scratched or dirtied, they can be washed in the sink with some soap. They are incredibly comfortable - if first bought these for a job where I was on my feet for about 10 hours day for 10 days straight. I highly recommend them to anyone looking for comfortable footwear.