hanna_anders It helps a lot if the girl had ballet training when youngl That develops the extreme arch needed for the ballet boots/heels. But it is a very interesting look. The fact you can walk in 6 inch heels is great.
I should also add that the quality of the shoe/boot is another factor in ease of walking in them. The shoes and boots from the Italian maker "PunitiveShoes.com" are much easier to walk in than the stuff from Pleaser or Amazon. There are modifications you can make to the heel on those that helpt but if you really want to walk in them, go with the better brands.