The Shetland is a primitive, unimproved breed noted for its natural hardiness, lambing ease, longevity, and ability to survive under harsh conditions. It is one of the smallest breeds of sheep.

Shetlands are known primarily for their production of colorful wool upon which the Shetland woolen industry is based. Shetland comes in one of the widest ranges of colors of any breed. There are 11 main colors as well as 30 markings, many still bearing their Shetland dialect names. Shetlands naturally shed their wool during late spring/early summer.