I've been scoring the internet for months to find these two - toned heels in my very small shoe size of 5.5. (katestylepetite.com)
I will say, though, that I had to buy them almost full size smaller than my normal shoe size in order to get them to fit in the heel. (looplooks.net)
Go with your usual shoe size in these, and expect to need to break them in for about an hour around the apartment with thick socks on before you wear them out. (effortlesslywithroxy.com)