I got these in turquoise and purple in a size 7.  I am a true 7 with fairly narrow feet and flat footed.
I'm keeping these even though they aren't perfect because they are absolutely gorgeous and have a low heel and will go with so many things.
However, if you can order a size up (mine was out of stock), definitely do!  The part that goes across the top of your foot is extremely low and tight and hopefully it'll stretch with wear because it does dig into foot!  The foot bed is padded and nice - only thing is that the heel area of foot bed has the patent material so it's just a bit slippery and might be more so in heat if your feet get hot.
Otherwise, no complaints...stunningly pretty colors, pattern and detail and material is nice - very easy on/off as well - I didn't even have to undo the strap (which I love)!  Heel/sole is made well and seems sturdy also.  Hope this is helpful :-)