The purpose of this study was to analyze and minimize structural error between sample knitting and actual knitting in weft knitting apparel. Basic stitches used in this study were plain stitch, $0{ imes}0$ rib stitch, $1{ imes}1$ rib stitch, $2{ imes}2$ rib stitch, Milan rib stitch. They were knitted into two different gauges(7 and 12 gauge) and 6 different sample sizes by computer program. The weight, length and width of these 5 basic knitting stitches were measured and their changes according to gauge, stitch and knitting were calculated and analyzed. The results were as follows; The weight of $0{ imes}0$ rib stitch was the largest, followed by Milan rib stitch, $2{ imes}2$ rib stitch, plain stitch and $1{ imes}1$ rib stitch. As the density of stitch per unit area increases, the weight increases. The length of $0{ imes}0$ rib stitch was the largest, followed by plain stitch, $2{ imes}2$ rib stitch, $1{ imes}1$ rib stitch and Milan stitch in both 7 and 12 gauge. As the number of course increases, the length increases accordingly. However, its increase ratio shows higher than that of number of course. It means that the reduction in number of course is needed to get aimed length. The width of Milan rib stitch was the largest, followed by $0{ imes}0$ rib stitch, plain stitch, $2{ imes}2$ rib stitch, $1{ imes}1$ rib stitch in 7 gauge. In 12 gauge, Milan stitch, plain stitch and $0{ imes}0$ rib stitch were the highest, followed by $2{ imes}2$ rib stitch and $1{ imes}1$ rib stitch. It showed that the change in shape of stitch influenced on the width more than the length of stitch.