Tabas rugs are knotted in central Iran. Tabas is located about six hundred kilometers south of Mashad. The city of Kashmar is to the north and the cities of Birjand and Ferdows to the east. The pattern consists of medallions with loops and arabesques in bright colors. They are like Nain rugs but more rustic. Inspection of the back of the carpet is important because the weavers in Tabas use Persian knots. The quality of the carpet depends on the number of knots, which can vary.