A small fraction of rugs in all categories and periods fall within the rare rugs category and the extremely rare rugs are one of a kind. Rare rugs are the most unusual ones for their size, design, or weave i.e., a Heriz rug of 200 knots per square inch and tighter or a 100% flawless rug of any type even within the city category. An exceedingly small rug design woven in rugs typically known for being room size and larger oversized rugs such as Muhajeran Sarouks or Haj Jalili Tabriz and vice-versa an exceptionally large rug design woven in rugs of typically smaller sizes such as Tribal rugs are also rare.

A floral rug of specific design such as hunting a scene rug amongst the tribal rugs that are usually geometric and stylized would also be a rare rug. Bridal rugs are rare artistic witty rugs woven by mostly village girls as part of their own dowry before becoming a bride that would also represent their talent and money-making capability. In the cities however, even though girls might be talented rug weavers, weaving a rug as part of their own dowry is not customary because it is regarded as their family’s financial inability to provide for the dowry thus a city Bridal rug is extremely rare and considered one of a kind.