I have recently discovered a critical bit of fashion wisdom that I think is worth sharing. The length of your feet determines how high your heel should be for comfort and safety.
When wearing a heel, you need to be able to raise up on the balls of your feet and be able to lift the heel one inch off the ground. If you can't do this, then your heel is too high. No amount of dexterity will allow you to walk gracefully in the shoes.
So since my feet are a petite size 6.5, a three inch (maybe a four inch) heel is about as high as I can go.
These black satin Fioni heels have a three-inch heel. I could go up to a four-inch, but that's about my limit.
If you really, really long for the extra height, there are a couple of ways to do a higher heel: 1) a platform heel will add height and stability and 2) a boot adds stability since it encases the top of your foot and ankle.