What KPSI means, what it allows at each tier, how it drives price, what it does not tell you, and how to specify it to a client without leading with the number.
KPSI stands for knots per square inch — literally the number of individual knots tied per square inch of pile. Each knot is one tuft of yarn tied by hand around two warp threads on the loom. The figure is the truest single measure of how finely a rug is woven: more knots means finer pattern resolution, denser and more durable pile, longer weaving time, and higher cost. Everything else about a hand-knotted rug’s price and capability flows from this one number.
| Tier | KPSI Range | What it allows |
|---|---|---|
| Atelier | 50–100 | Clear geometric and tribal patterns |
| Signature | 150–250 | Detailed floral and medallion work |
| Maison | 300–400 | Fine curvilinear patterns, portrait-level detail in large rugs |
| Reserve | 450–560+ | Any pattern at any scale. Used for collector-grade pieces |
| Studio | N/A — tufted | N/A — tufted construction, no KPSI measurement |
The relationship between KPSI and price is essentially linear: higher KPSI means more weaver-time per square foot, and weaver-time is the cost. As a rough rule, a 400 KPSI rug takes roughly four times longer to weave than a 100 KPSI rug of the same size — four times the hours at the loom, four times the labour in the price. When a client asks why one custom rug costs several times another of the same dimensions, the knot count is almost always the answer. The full pricing breakdown is on the cost guide.
KPSI is necessary but not sufficient. It says nothing about material quality — a 200 KPSI hand-spun wool rug can be a far better object than a 200 KPSI acrylic one woven to the same count. It says nothing about dye quality, whether the colours are natural and lightfast or cheap and fugitive. And it says nothing about finishing quality — the washing, blocking, and fringe work that separate a rug that lies flat and ages well from one that does not. Treat KPSI as one specification among several, not a single quality score. The same caution applies to the knotted-versus-tufted distinction in hand-knotted vs hand-tufted.
Do not lead with the number — clients do not have a feel for what 250 versus 400 means, and quoting it cold invites a price-shopping conversation. Lead instead with the pattern complexity the client wants: how fine the detail, how flowing the curves, how much portrait-level realism. Then back into the KPSI required to execute that look, and let the density follow the design rather than the other way around. The number becomes a means to the result the client already said they wanted.