I wear a size 8 in athletic shoes (7.5 in "normal") shoes and ordered a size 40. There happens to be lots of wiggle room but it's not noticeable when I'm on my bike. I bike commute a lot and find these very easy to walk in, albeit minimal clicking. It doesn't feel like normal shoes of course, but it's OK. Construction-wise, you get what you pay for. These aren't the highest quality pair but they do the job. I'm curious to see how long the velcro will last before it stops sticking. Overall, I like it.