Compared to other Vibram five finger shoes, go up one European size.  I wear 42 in all my vibram shoes, but these were too small and I have already ordered the 43 and will be returning the 42s.  I had to double check the labels because it just feels like I got a 41.

Otherwise, these seem great.  They appear to be the most minimal and simplest Vibram Five Finger shoe Ive gotten to date.  Will post more after I get my size and wear them.