I don't know what size I wear in the 5 Fingers, but I take a size 10 in my Brooks Ghosts and Cascadias, and a 9 in my Clark Mary Janes. I will take this to the private messages. I do think they are worth checking out since I am not planning on using them for anything more than actual KB lifting and walking from the locker room, and I will be indoors with them. I wish they would let me lift barefoot at my gym :-)

Thank you!