I really like these shoes. They just look so cool. However, cougars are notoriously small, so I actually debated whether to go half or full size. I ended up going full size, and while I was comfortable I could probably go down a half. I usually wear US10.5M but wear US10M in Adidas. For these Puma trainers they (luckily) went up to 11.5M US and I think even 12M US would have worked for me. Bigger and they are amazing!