A shoe size is an alphanumerical indication of the fitting size of a shoe for a person. Often it just consists of a number indicating the length because many shoemakers only provide a standard width for economic reasons.

There are several different shoe-size systems that are used worldwide. These systems differ in what they measure, what unit of measurement they use, and where the size 0 (or 1) is positioned. Only a few systems also take the width of the feet into account. Some regions use different shoe-size systems for different types of shoes (e.g., men's, women's, children's, sport, or safety shoes).

The length of a foot is commonly defined as the distance between two parallel lines that are perpendicular to the foot and in contact with the most prominent toe and the most prominent part of the heel. Foot length is measured with the subject standing barefoot and the weight of the body equally distributed on both feet.

The sizes of the left and right feet are often slightly different. In this case, both feet are measured, and purchasers of mass-produced shoes are advised to purchase a shoe size based upon the larger foot.

A shoe is an item of footwear intended to protect and comfort the human foot while doing various activities. Shoes are also used as an item of decoration. The design of shoes has varied enormously through time and from culture to culture, with appearance originally being tied to function. Additionally fashion has often dictated many design elements, such as whether shoes have very high heels or flat ones. Contemporary footwear varies widely in style, complexity and cost. Basic sandals may consist of only a thin sole and simple strap. High fashion shoes may be made of very expensive materials in complex construction and sell for thousands of dollars a pair. Other shoes are for very specific purposes, such as boots specially designed for mountaineering or skiing.

Shoes have traditionally been made from leather, wood or canvas, but are increasingly made from rubber, plastics, and other petrochemical-derived materials.

Until recent years,^[when?] shoes were not worn by most of the world's population — largely because they could not afford them. Only with the advent of mass production, making shoes available very cheaply, has shoe-wearing become predominant.

Demetri Martin (born May 25, 1973) is an American comedian, actor, artist, musician, writer and humorist. Martin is best known for his work as a stand-up comedian, contributor on The Daily Show and for his Comedy Central show Important Things with Demetri Martin.

Demetri Martin was born to a Greek American family in New York City, New York, and grew up in Toms River, New Jersey. He is the son of Lillian, a nutritionist, and Dean C. Martin, now deceased, a Greek Orthodox priest. Martin graduated from Yale University in 1995. Although he was accepted into Harvard Law School, he went to New York University School of Law after he received a full scholarship.

In 2001, Martin caught his first big break in stand-up comedy when he appeared on Comedy Central's stand-up showcase Premium Blend. At the 2003 Edinburgh Festival Fringe he won the Perrier award with his show If I.... The show was turned into a British television special in 2004. From 2003 to 2004, Martin wrote for Late Night with Conan O'Brien. In 2004, Martin had his own Comedy Central Presents stand-up special. His special was divided into three parts. In the first, he performed in traditional stand-up comedy fashion. In the second segment, he used humorous drawings as visual aids, which would serve either as the punchline or a background. During the third segment, he played a guitar and put on a pseudo-play where he would strum his guitar while alternating between playing harmonica and talking; some of his comedian friends dressed as fairies and dragons acted according to the story he was telling, detailing the magical land where his jokes came from. Martin's mother and grandmother also appeared.