Basic method of joining yarn
This simple method works with any yarn, but it may not be the best alternative. It leaves ends that must be woven in later, which can create additional bulk. Some knitters choose to change yarns at the sides of their work, but if you do it correctly, you can change yarns at any point and it will not be visible on the right side when you complete the work.
Work until you have 6 inches of yarn remaining. Simply begin knitting with your new ball of yarn (a contrasting color is shown here), leaving a 6-inch tail on it as well. The first few stitches may feel loose, so you may want to make a simple overhand knot to help hold the new yarn in place. Remove this overhand knot before you weave in your ends.