Nowadays one of the main art of knitting is Rib knitting. Rib is one of the most vital basic knitted structures. The term Rib is used to describe a knitted fabric with vertical rows of loops meshed in the opposite direction to each other. In weft Rib knitting, alternative wales will be having face and back loops. One vertical row of Wales is meshed in the opposite direction to the other vertical row of wales. Face row or loops tend to close up in one plane and so also the back row of loops in the other plane. Thus stitches of rib fabric lie in two planes and hence the rib structure is also known as double jersey structure.