I normally wear 8, so I ordered size 9 and they are still snug. I used my hair dryer on high heat to blow air into the shoe then put on thick fuzzy socks and blow dried the outside of the shoe to stretch it out. I wore them to work and they began to rub on my heels midway through the shift. I will repeat the blow dryer process again to fully break them in.  Wish I knew to order up though. Besides that they're very comfortable and Im excited to break them in