Among the rooftop rugs, most parts of Iran are exceptional, while in the design and texture of that artist and elegance and accuracy. For the following reasons, the rug may be exceptional: an unusual dimension and shape and layout. In some cases, according to people’s or institutions and countries, carpets are woven with exceptional dimensions, both in length or proportion, or in terms of design. Such carpets are often artistic and are not used for subversion. (b) Unusuality of raw materials and textures: Some custom and artistic carpets are used with a variety of non-practical disciplines such as gold or silver threads and wires, or are used to get that unusual method. The decoration of carrying out the operation of ornaments such as giving the frame or highlighting flowers or the use of very good fibres and hands of China also makes it exceptional when it comes to having good rug textures. The rug may be decorated with precious stones such as diamonds and so on, which is called the "simple" rug.