Numbering yarns systems

To classify a thread many characteristics, such as strands or ropes, weight, length, etc. are used. So as combine this has resulted in the creation of various numbering systems. They follow different metric systems, business customs etc. It is important to know because we'll find printed on the labels of the balls we buy.


Fixed weight numbering systems:

Weight is a fixed unit and length is measured.

  • English numbering system (Ne): 840 Yards to weigh 1 pound or 840 yards / lb
  • Metric numbering system (Nm): 1000 meters weigh 1 kilogram or 1000 meters / Kg

In these fixed weight systems we must be aware that the thread gets thinner the more rises the Ne or Nm.

Fixed length numbering systems:

The length is fixed and the unit weight is measured.

  • Denier: The weight in grams of 9000 meters.
  • Tex is the weight in grams of 1000 meters.
  • DECITEX: It is the weight in grams of 10,000 meters.

In these systems fixed length have to be aware that the yarn is thicker and heavier the more rises the Denier, Tex or Decitex.

Ticket numbering systems

The ticket number or bill is a commercial numbering system, it is the manufacturer part numbers for a given thread size. Numbers Ticket are similar to the system of fixed weight, so we must consider that in this higher system is the ticket number, the thinner is the thread, and the lower the ticket number, the heavier or thicker the thread.

Tows or strands

The amount of tows or strands having a yarn is specified as follows:

  • Ne 24/2 for cotton fibers Where / 2 means that thread consists of 2 strands or threads
  • Ne 2/32 for wool fibers where 2 / means that the thread is composed of two strands or threads


  • Table of equivalent of yarn numbering systems

    # Tex Dtex Den Nm Ne
    Tex 1 10xTex 9xTex 1000/Tex 591/Tex
    DeciTex Dtex/10 1 0.9xDtex 10.000/Dtex 5910/Dtex
    Denier Den/9 Den/0.9 1 9000/Den 5314/Den
    Metric Number 1000/Nm 10.000/Nm 9000/Nm 1 0.59xNm
    English Number 590/Ne 5900/Ne 5314/Ne 1693xNe 1