Foreward This method is similar to International Standard ISO 5084, Textiles - Determination of thickness of textiles and textile products. The sizes of the pressor feet required by the ISO Standard are not in agreement with North American test equipment. 1. PURPOSE AND SCOPE 1.1 This method measures the thickness of textile fabrics as determined between parallel plane surfaces under an arbitrary pressure. Since all textile fabrics are compressible, the thickness will depend upon the pressure applied.