I have purchased 5 pairs of Tom's - I own 1 pair.  You never know whether you need to go 1 or 1/2 size down AND so I've decided I have to buy them at a local retailer and try them on.  Other problem is that often times 1 shoe feels bigger than the other.  ANyway, I'll find more and I'll love them but it will take alot of trying on.  Well I went against my own philosophy and ordered another pair of glitter Toms and they fit BUT there is not  nearly the arch support that I have in my canvas Toms.  That's the amazing thing about them is that you feel barefoot with support.  So they have to go back.  Bummer.  If you can handle no support - you'll love these little gems.