I'm normally a 6.5 or 7 medium width.  The black leather ones fit me in a 6.5.  Lots of room left in a 7 and needed insert.
I also ordered the black suede ones in a 6.5.  The black suede ones run smaller in 6.5.  Circulation cut off literally.  Returned the black suede ones for a 7.
I really love these shoes, and they look so elegant on.  Sizing was difficult.