This is NOT a regular size. they are very tight. I wear 9 to 9.5 and got them in 9.5 and they felt good at first but after about 20 minutes I realized these things are very tight on my legs. They look great but I had to refund the money
Pros
Light and super comfortable! Let the air circulate through your shoes to keep your feet from sweating!
Cons
It is small and narrow compared to other shoe brands.