The field guide · Knots and fineness
Raj رج
Raj (رج, literally "row") is the Iranian trade measure of fineness: the number of knots in 7 cm, counted across the width of a rug. On a coarse weave, count the warps: each knot sits on a pair, so warps per centimetre divided by two is knots per centimetre, and seven times that is the raj.
Also raj count · rajj
See also Knot density (KPSI), Warp, Jufti knot
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