I did the same thing but made mine and they are about an inch if I remember right. They look fine but you will be draggin them alot more. I drag em every time I ride just be careful because your pushing the solid mount bracket out also and you dont want to take weight off the rear tire in a lean = not good.
If the truth be known, the floorboards should come with these extensions installed as stock parts. As far as looking bad or out of place, how many people have you ever seen walking around the bikes at any stop and paying very close attention to the floorboards? I have never owned any Harley newer than my present 2004 RK and even when I rode my old shovels with the Krylon paint jobs and black duct tape on the seats, noone said a word to my face. If they had, I would of laughed and told them what my father told me when I bought my first 1949 Chevrolet. Remember this Son, A LOW CLASS RIDE BEATS THE HELL OUT OF ANY HIGH CLASS WALK ON ANY DAY!!