I usually wear a 7.5 but after reading other reviews I went with a half size down and the 7 was perfect.  I love this shoe to death.  i wore them without breaking them in for my sister's wedding and i was in them aaaaaalll day and night... by the end of the night, i had blisters and my feet were killing me, but oh so worth it.  I felt super sexy.  i have pretty small ankles and the ankle part was a little big on me but it didn't look bad.  still way hot.