When we think of shoes, we think of a matching pair. But there a many reasons why people need single shoes, or shoes that don't match. Sometimes it is as simple as feet that are two different sizes. Other times, the situation is more serious. People with foot deformities, for example, not only need shoes that don't match ? they often need shoes that can help correct their deformity. Clubfoot, which is a birth defect, is the perfect example of a problem that can be improved with the right pair of shoes. In fact, when people with clubfoot stop wearing corrective shoes, their deformity can return and worsen.

Amputees may only require one shoe, but it is a shoe that has an important job to do. This shoe must support the weight of the entire body. It must cushion and protect the joints. It must be able to act as a shock absorber and provide excellent traction for its wearer. At the same time, the shoe must be comfortable and not hurt the foot.

Both people who need corrective shoes and people who rely on one shoe alone, benefit from the added support, comfort and correction that orthopedic shoes provide. They are not alone. Millions of people require orthopedic shoes for minor problems such as flat arches. These common problems may seem like no big deal but over time they can cause serious tenderness in the foot and even lead to deformity.

But while most people with foot problems can manage with a matching pair of orthopedic shoes, people who suffer from deformity on only one foot or who are amputees require "odd shoes" ? shoes that are not only address their special needs but also are singletons. Why buy a pair of expensive orthopedic shoes, when you only need one? Luckily, certain online sites such as OddShoe allow people to sell and buy single and specialty shoes from the convenience of their home.