Knot Density

Knot density is measured by counting the knots visible in a one-centimetre square of the pile surface, or by calculating from the row and column counts. A higher density means more individual knots per unit area, which allows more detailed patterning and generally produces a firmer, more durable pile.

For Moroccan Amazigh pile-knotted rugs, knot density ranges from coarser (approximately 4–10 knots per cm²) in village-made pieces with bold geometric patterning, to medium (10–25 knots per cm²) in more refined examples. High-density Persian-style knotting (40–100+ per cm²) is not typical of the Amazigh tradition.

Importantly, knot density is not a universal quality indicator, it must be considered relative to the tradition and intended design. A bold Beni Ourain composition with 6 knots per cm² is not inferior to a finer piece; the coarser knotting is appropriate to the scale and vocabulary of that tradition.