The aim of this research is to investigate the effects of spinning method, raw material, twist coefficient and strand spacing on the physical properties of single jersey knitted fabrics. For this purpose, different sirospun and ring spun yams were produced both in long and short staple spinning systems with different raw materials. Single jerseys knitted fabrics were produced from these yams. The physical properties of yarns and knitted fabrics were tested and statistically evaluated. Sirospun yarns generally had better yam properties compared to ring spun yams. Especially yam hairiness values of sirospun yams were considerably lower than ring spun yams. Generally bursting strength, air permeability, surface friction properties of the fabrics knitted from sirospun yarns were found better than the fabrics knitted from ring spun yams.