Oh wow, I was a shoe sales associate and was always told to go a half size bigger just for room and comfort. But your the first to say a half size smaller.
My advice to anyone buying high heel shoes, you ALWAYS want to go a half a size. bigger than what you would normaly wear in flats or tennis shoes. Ex I wear 8 and in heels 8.5...I know some of you are probably like duh but this is for those who don't know that.