A square yard is a unit of area used to measure the amount of material needed for a project. It is defined as the area of a square that measures one yard (36 inches or 91.44 cm) on each side. In other words, it is a square-shaped piece of land or fabric that measures one yard by one yard. The phrase "square yard" is commonly used in real estate, construction, and interior design to describe the amount of material needed for a project or to estimate the amount of space needed for a particular purpose.