Kairouanese carpets that originally had only 40,000 knots per m2 (20x20), now include intermediary textures of 90,000 knots per m2 (30x30), and 160,000 knots per m2 (40x40) – these are the most common and most often requested. Finally, the best and finest carpet is the « Harir » or silk carpet, 250,000 knots per m2 (50x50), 360,000 knots per m2 (60x60), and 490,000 knots per m2 (70x70)