KASHAN carpets and rugs have the greatest curvature and visibility among those of the cities in central of IRAN. They all have similar patterns--a single medallion in the center and Persian floral motifs, including arabesques and flower-stems, palmettos, rosettes, blossom and leaf motifs, forming one of the densest patterns.
KASHAN rugs and carpets are of excellent quality. Older ones (before 1945) are very good, but some of the newer ones are not as good. They sometimes have lower KPSI and they are chemically dyed. On the other hand, if you are a wise buyer, you can find a great deal. KASHAN rugs and carpets are one of the finest looking carpets in IRAN and the world.
Size & Shapes:
KASHAN carpets come in different sizes, but the majority of them are mid-size (4 x 6 to 8 x 10 feet). You can also find large rugs up to 0 x 18 feet.
Ivory, light green and red predominate. Other colors such as soft green and blue are found in newer carpets.
Kashan rugs and carpets have soft wool and a thin, tight pile.
The foundation (warp and weft) of the rug is cotton, except in very fine pieces where it is pure silk.
KASHAN rugs and carpets have Persian knots, The weave is fine to exceptionally fine. The quality of the carpet depends upon the number of knots, which varies, but averages from around 120 KPSI (30 RAJ) up to 842 KPSI (80 RAJ).
KASHAN rugs and carpets are among the finest quality carpets. Be prepared to pay $4-$25 Per Square Foot (PSF) for a carpet from KASHAN. Keep in mind that, as a rule, the higher the KPSI, the greater is the price.
More info on KASHAN rugs at Jozan.net.
More info on KASHAN rugs at JBOC's Notes.