ISO 1144:2016给出了表示线密度的Tex系统的原理和推荐单位，包括用于计算其他系统中数字或计数的Tex值的转换表，以及贸易和工业中实施Tex系统的程序说明。 Tex系统适用于各种纺织纤维、中间产品（例如毛条、棉条和粗纱）、纱线和类似结构。

ISO 1144:2016 gives the principles and recommended units of the Tex System for the expression of linear density and includes conversion tables for calculating the tex values of numbers or counts in other systems together with a statement of the procedure for the implementation of the Tex System in trade and industry. The Tex System is applicable to all kinds of textile fibres, intermediate products (for example tops, slivers and rovings), yarns and similar structures.