I have a pair of boots with a Cuban heel, (made for men) and I was walking around the city in them and literally cried at one point. I think the heel is 5.5 cm....I love the boots, but damn, I don't know how the hell women walk around in heels all day and these would not even be 3 inches converted.....my wife was laughing at me because I had to think about my every step and my calves were arching afterwards......
as for men wearing womens high heels...