Learn How to Knit - Assembly
When assembling finished project pieces, use a large-eye, blunt-tip yarn needle and the same yarn you have used for knitting the project to sew the seams. If the yarn is very bulky or textured, use a finer, smooth yarn in a matching color for sewing. The Mattress Stitch is perfect for joining seams. The Kitchener Stitch (grafting) is used to join the toe of a sock to avoid a seam.