#731P Swiss Check Pullover. Yarn: Worsted Weight. Level: Intermediate. Sizes: 32 through 44. A cozy sweater worked on #10 needles in the handsome Swiss Check pattern, a relatively easy slipstitch originating in France centuries ago. Paired with worsted weight yarn, the stitch creates a thick, yet lofty, warm fabric – good for winter sports and outdoor activities. Slipstitch patterns are most effective when knit with smooth, evenly spun yarns, and it is important to use two colors of the same yarn to achieve distinct and even patterning. Swiss Check is fun and satisfying to knit for the intermediate. The stitch is dramatic in two colors of high contrast and subtle in two colors of similar value.