These are super cute and I got them in black.  I'm a size 9 with narrow feet.. I went with a 9 just to be safe even though some people said to size down.  They were too roomy at first - not with the length so much but more on the sides/top of the shoe.  The shoes come with a separate set of basic insoles which I then put in, and they fit pretty good now, so I think I went with the right size.  I think a 8.5 would maybe have been a little small in length, but also could have probably worked.