|Vintage Bakhtiari Persian Rug / Garden Design The Bakhtiari rug, along with other weavings, is a major artform of the Bakhtiari tribe, located in Chahar Mahaal and Bakhtiari, Iran. Since the early 19th century, Bakhtiari rugs have been exported around the world. Bakhtiari carpets are based on a cotton foundation (warp) with a wool weft usually taken from the herds of the producing tribe. This leads to unique carpets that differ depending on the characteristics of each tribe's wool. The wool can range from dull to extreme glossy and the resultant pile is clipped medium to high. The best carpets with the highest knot density are often known as Bibibaff.[a] Prices range considerably with the highest knot density rugs generally being the most expensive, but price is also affected by criteria such as the pattern and the dyes used. Chapel Shotur and Saman pieces are rated slightly beneath Bibibaff productions, but are still considered to be good to excellent. Hori carpets are of looser weave and inferior quality and as such, are generally widely affordable. The sizes vary from narrow hall carpets to large room designs, often up to 4 m × 5 m. The larger rugs tend to be very rare and harder to come by. Similarly, older rugs, often coveted by collectors, can be extremely costly.