Yarn weight refers to the thickness of the yarn, which affects the final appearance and texture of a knitted or crocheted project. It is categorized into several standard classifications, ranging from lace weight, which is very thin, to super bulky, which is much thicker. Each weight category has specific uses and is suitable for different types of projects. Choosing the right yarn weight is essential for achieving the desired outcome in your work. For example, using a heavier yarn can create a warm, cozy blanket, while a lighter yarn is ideal for delicate shawls. Understanding yarn weight helps crafters select the appropriate materials for their designs.