I once wore a pair of black shoes to work...looked pretty much the same...except they had two different height heels. I realized it when I got out of the car...but luckily I called a co-worker (same size shoes) that came in after me to bring me a pair of her shoes for the day. Still haven't figured out how I walked across the downstairs, up the stairs to the garage and didn't notice the 1/2" difference.