Saw this on QVC for much higher price & S/H charges.  Saw them on Amazon & decided to try these shoes.  I do have "feet" issues.  I ordered my regular size 9M in charcoal. I couldn't believe how light  these shoes are.  I was able to get my orthodics in them.  I wore the shoe with a light pair of socks & they fit fine.  I also wore them with knee-hi stockings, they fit better..a little more room. .Great shoe for work, can wear them all day without any "issues".. However, if you intend to wear these shoes with a thick sock I would probably go up 1/2 size.  Will be back for another pair.  Finally a pair of shoes I can wear with comfort besides my Sole flip-flops during the summer.