Choose a yarn that is suitable for your project. A warm yarn, such as wool, is a good choice for a scarf. Wool is also ideal for beginners because its elasticity makes it easy to work with and less-than-perfect stitches are not so noticeable. Be sure to use the correct weight, or thickness, which will be indicated in your knitting instructions. Each ball of yarn has a ball band (a label) stating the fiber content, weight, amount (in yards and ounces), care instructions, suggested needle size, gauge, and dye-lot number. To ensure that all your yarn for a project is exactly the same color, buy it all at once and check that the dye-lot numbers match.