Materially affluent societies can offer a variety of different fashions, in clothes or accessories, to choose from. At the same time there remains an equal or larger range designated (at least currently) 'out of fashion'. (These or similar fashions may cyclically come back 'into fashion' in due course, and remain 'in fashion' again for a while.)
Practically every aspect of appearance that can be changed has been changed at some time, for example skirt lengths ranging from ankle to mini, etc. In the past, new discoveries and lesser-known parts of the world could provide an impetus to change fashions based on the exotic: Europe in the eighteenth or nineteenth centuries, for example, might favor things Turkish at one time, things Chinese at another, and things Japanese at a third. A modern version of exotic clothing includes club wear. Globalization has reduced the options of exotic novelty in more recent times, and has seen the introduction of non-Western wear into the Western world.
Fashion houses and their associated fashion designers, as well as high-status consumers (including celebrities), appear to have some role in determining the rates and directions of fashion change.