In the old days when graph papers were not available and commonly used in remote areas, weavers had rug samplers which were used as guides and the rugs they would like to weave.
Rug samplers are collectible items and are rare to find. I love them and if I see them somewhere, try to buy them. These pictures are the courtesy of Nazmyal.
Dr. Khosrow Sobhe (Dr. Kay)
Certified Rug Specialist (CRS)