The Quarab Horse is a cross between an American Quarter Horse and an Arabian. They may also be registered with Paint horse blood instead of Quarter Horse. The horses may have from 1/8 to 7/8 of either breed, with any more or less of Arabian or Quarter Horse blood not eligible for registry.

The horses usually stand 14 to 16 hands high. They have a dished face, refined head, wide forehead, and large eyes. The build of the horse varies from the stock-horse type of the Quarter Horse to the typical Arabian build.