I am a solid size 6.  I ordered 1/2 size up (6.5).  They felt too small in length at first, but after wearing therm for a little bit (first time wearing, doesn't take long), they quickly stretched out.  They are super comfortable, and cute.  If I was more of a 6+ in size, I would have had to order a 7.  The toe box is wide enough to be comfortable for my bunions but not too wide.  The strap is adjustable, so you can make them snug enough to feel secure.  I ordered the black ones and they are so nice and comfy and cute, I ordered the blue and the taupe and an extra black pair.  The blue is a sort of faded denim blue and the taupe is a warm beige.  The price Amazon had them for is very excellent compared to other on-line stores.  I have a very hard time finding shoes to fit me - very narrow heel, bunions, etc.. So whenever I find something that fits, I always buy multiple pairs and put some up in a closet.  I have done this with these!  I wear them with cute lightweight socks.  I think that once I wear them in a bit they will be fine barefoot too.