Persian carpets are hand knotted carpets, tied with a single looping knot. Best carpets may contain more than 50 knots per square cm. Low to average Persian carpets contain about 30 knots/sq. cm. Knotting carpet is a labor intensive work and requires a great skill and craftsmanship. Perhaps that explains the high prices of these carpets. An average weaver is able to tie almost 10,000 knot per day. the quality of the carpet also depends on the knot density. The higher the knot density, more prized will be the carpet

Oriental Rugs can be defined as a hand-woven or hand-knotted rug of natural fiber made in geographical areas that include the Near East, Middle East, Far East and the Balkans.