I'm 6'. I have eleven pairs of heels. On average they are all 3"-3 1/2" heels with one pair of 5" heels. I find the 5" heels are hard on my feet and I hardly ever wear them. I can wear the 3" heels all day with no discomfort. I still have to get a pair of flats for driving. The 3" heels work fine for driving local streets, but, I do not find them comfortable from a safety viewpoint on the high speed roads.