Tabriz is one of the largest cities in Iran and is one of the most famous Persian rug provenance. the finer the rug is, as it indicates the knot density. This rug is made of hand spun sheep wool of the highest quality. Especially in Iran (former Persia), Afghanistan and Pakistan wool is still spun by hand before the actual knotting of the rug begins. Wool has proven itself as a natural and extremely hard-wearing material over centuries. Among other things, it has dirt-repellent and heat-insulating properties. At the same time, wool is incomparably soft and has a natural shine.

Traditionally hand-knotted rugs still form the highest quality standard among all types of rugs. Depending on the type of knot, the rugs are extremely robust and can last for generations. The finer and tighter a rug is knotted, the more detailed ornaments and patterns can be depicted on the pile. At the same time, a very fine oriental rug requires a much higher manual effort as well as a higher level of experience and skill of the knotted . Thus the knot density also serves as a decisive value factor of hand-knotted rugs. The quality is not directly related to the knot density. A rather coarse rug may well have been made in excellent quality.