This is my first pair of Miz Mooz and I normally wear between an 8-8.5 M. I ordered the 8.5 M as my feet tend to be on the wider side and the shoe fits, but I know I can probably wear an 8 and be okay. The shoes are very comfortable and since they are slightly too big, the back strap is perfect in my case. These will be great work shoes, and I am very excited to put them to good use!