The Persian ([[Asymmetric Knot|asymmetric]]) knot is universally used. Flatwoven KILIM rugs also were made for use as floor coverings, storage bags, and other tribal necessities. Shahrbabak pile and flatwoven rugs were considered inexpensive, and were suitable for the local market and foreign export. These rugs were made as floor coverings and as nomadic items woven for personal use. Shahrbabak formats range from small bags to rugs approximately eight feet by five feet. The grade quality ranges from medium to good.<ref>Moheban, 2015, p.523</ref><br>