My normal shoe size is 6.  Because of the width of my toe bed, sometimes I get a 6 and 1/2.  I decided to get these in a size 7, which turned out to be right for me.  Maybe I could have gotten by with a 6 and 1/2, but with a 7 I have the option of wearing socks.  I'm either barefoot or wearing flip flops most of the time, so closed-toed shoes have to be very comfortable for me.  These will work out well comfort-wise for my clogging class, which starts in a few weeks.  As for arch support:  People, exercise your feet to strengthen your arches!  Arch supports are just crutches for the feet.  Go barefoot, rise up and down on your toes, and you won't need arch support.  Arch supports actually weaken the feet..