This book contains eight chapters include with references. Chapter one contains the description about the work. Chapter two contains literature survey. Chapter three describes lock stitch formation process. Chapter four contains preliminary investigation of the thesis work. Chapter five contains experimental details of the work. In this chapter a grading system is developed on the respect of some sewing properties. Chapter six contains discussion of results.Conclusion implies that both sewing thread count and SPI affect sewing quality. At present sewing thread count is selected ...