Attaches easily to most stiletto and kitten heels. * Classic size: Fits heels 8 to 11 mm (about 3/8") diameter at the heel tip. Also available in Narrow (1/4") & Medium (1/2") widths. * Discreet, easy to use and reusable. * Extends the life of your shoes. * Can also be used with bricks, grates, antique floors and woven carpets. Also protects the heels when driving a car!