I am a 5.5 shoe size, so I ordered a 6.5 to allow for thick socks. However, when I put them on to go boarding they were extremely snug. After an hour or so my toes felt like they split open, and when I took the boots off, my big toes were completely flat because of how tight they were. I am going to send them back to get a size 7. Other than the tightness I loved them! Just make sure you get a bigger size than you think you need.