La grades explained
La is the special quality system of the Nain manufactories. A low La number means a finer knotting, which is counterintuitive and often misunderstood at the point of purchase. This page explains the system and its practical meaning.
#What La means technically
La is a Persian measure for the number of warp threads grouped together in a given bundle. In the Nain tradition you count the number of threads per weft and knot section, and lower La numbers correspond to finer knotting.
The system is used exclusively for Nain rugs. Other Persian knotting centres (Tabriz, Isfahan, Kashan) use knot density per square metre or the Raj measure, not La. If a dealer talks about La grades on a Tabriz, that is a confusion of terms.
The typical Nain La grades are 4 La, 6 La, and 9 La, with occasional special pieces at 3 La (extremely fine) and 12 La (coarser, more of a domestic-rug quality).
#What the La grades mean in practice
9 La. Standard Nain quality. Roughly 300,000 to 400,000 knots per square metre. The knots are visible, the piece feels structured. Price range per square metre: 1,500 to 2,500 euros. The most common grade in the trade.
6 La. Upper-tier quality. Around 500,000 to 700,000 knots per square metre. Knot work clearly finer, patterns more detailed. Price range: 2,500 to 4,500 euros per square metre.
4 La. Top quality. 700,000 to 1,000,000 knots per square metre. Very fine detail work, often with silk contours. Price range: 4,500 to 8,000 euros per square metre, with signed manufactory pieces well above that.
3 La. Exceptional, often a special order or exhibition piece. Over one million knots per square metre. Market prices are negotiated individually and regularly exceed 10,000 euros per square metre.
#What you can check yourself
A rough estimate of the La grade can be made without special tools. Press the pile apart at one spot and look at the knot structure. At 9 La you see clearly separated knots that you can tap individually with a finger. At 6 La the knots are tighter but still recognisable. At 4 La you will need a loupe to count individual knots.
For a more precise measurement, count knots per square centimetre on the back and compare with the figures above. Around 30 knots/cm² corresponds to about 9 La, 50 knots/cm² to about 6 La, 80 knots/cm² to about 4 La.
Important: the wool quality matters at least as much as the La grade. A 4 La in middling wool is worth less than a 6 La in cork wool. If a dealer quotes only the La grade, ask specifically about wool quality, manufactory signature, and dyeing.
#Avoiding confusion at purchase
Three common misunderstandings when buying a Nain.
Misunderstanding one: a higher La number is better. Wrong. With La the reverse principle applies. 4 La is significantly finer than 9 La.
Misunderstanding two: La applies to all Persian rugs. Wrong. La is specific to Nain. On a Tabriz or Isfahan you count knots per square metre directly.
Misunderstanding three: La tells you everything about quality. Wrong. La measures only the fineness of the knotting. Wool, dyeing, manufactory, and provenance matter just as much.
For the buyer this means in practice: a dealer who can name the La grade of a Nain promptly and correctly, and who explains wool and dyeing alongside it, has competence. A dealer who uses La as a marketing term without explaining the background may simply not know enough.
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