Complete Guide to Knot Density in Persian Rugs

  Technical Guide · Buyer Education KPSI: Understanding Knot Density in Persian Rugs. The most misunderstood number in the rug industry. What KPSI actually measures, how to count it yourself, and why more knots doesn't automatically mean a better rug. 11 min read The back of a 400 KPSI Persian Nain. Each of those tiny squares is one hand-tied knot. In one...