I wear between a 9 and 9.5 and purchased a 9.5 to be safe.  Unfortunately, the shoes were very tight, and i spent a couple months trying to break them in.  They have stretched a great deal, but they are still not comfortable.  I wish I had bought a half size higher than normal.

The shoes themselves are beautiful, and i do wear them still, I might get another pair a half size bigger in another color.