I purchased these at a Diana store several years ago and stored them in my closet without using them for a while. I believe I've worn them about 10 times. The heel is approximately 7.5 cm. The chunky heel provides stability. I think they can be worn for both formal and casual occasions(^^) These are used items, so there is some scuffing on the surface, wear on the heels, and dirt inside. Please check the photos carefully before purchasing. The Diana box is not included. I will pack them in a separate cardboard box and ship them.