In this research, the authors have investigated the influence of loop length on the extension properties of single jersey, rib 1x1 and interlock cotton knitted fabrics. The single jersey, rib 1x1 and the interlock fabrics have been knitted in knitting machine with diameter of 18, 16, 18 inches and machine gauge is 24, 18, 21 respectively The cotton yarn Ne40 has used for all investigated knitted fabrics. Five values of loop length in knitting have been examined for every kind of fabrics knitted, which are 352, 362, 372, 382, 392
413, 428, 443, 458, 473
343, 353, 363, 373, 383 (mm/100 stitchs) respectivly for single jersey, rib 1x1 and interlock cotton knitted fabircs. The extension of the fabric by courses (horizontal) and wales (vertical) directions have been measured. It was found that the extention by wales direction depends on the loop length: for 3 types inverstigated knitted fabrics: vertical extension decreased in increasing the loop length. There is not clear relation between the extension by course direction and the loop lenghth, but the most extension fabric is what which has the value loop length nearest to the optimal values for dimensional stability of every types knitted fabrics.