History
The earliest known shoes date from about 8000 to 7000 BCE and were found in Oregon, USA in 1938[1]. However, the materials used for making shoes do not normally last for thousands of years, so shoes were probably in use long before this. Physical anthropologist Erik Trinkaus believes he has found evidence that the use of shoes began in the period between about 40,000 and 26,000 years ago, based on the fact that the thickness of the bones of the toes (other than the big toe) decreased during this period, on the premise that going barefoot results in greater bone growth before this period.

Women's shoes on display in a shop window, 2005.
Fashion shoesA shoe is an item of footwear. Shoes may vary from a simple flip-flop to a complex boot. Shoes may have high or low heels, although in western cultures, high heels are considered a women's style. Shoe materials include leather or canvas. Athletic shoe soles may sometimes be made of rubber.

Women's shoes
There is a large variety of shoes available for women, in addition to most of the men's styles being more accepted as unisex. Some broad categories are:

High heels may be shoes with heels 2 inches (5 cm) or higher. They are often seen as having more sex appeal than low heels (see article for discussion) and are thus commonly worn by women for formal occasions or social outings.

Either gender

Sizes
Main article: Shoe size
Units for shoe sizes vary widely around the world. European sizes are measured in Paris Points, which are worth two-thirds of a centimetre. The UK and American units are approximately one-quarter of an inch, starting at 8¼ inches. Men's and women's shoe sizes often have different scales. Shoes size is often measured using a Brannock Device, which can determine both the width and length of the foot.