A yard (abbreviation: yd)'s a unit of length in several different systems, including English units, Imperial units, and United States customary units. It's equal to 3 feet or 36 inches, although its length in SI units varied slightly from system to system. The most commonly used yard today's the international yard, which's equal to 0.9144 meter. The yard's used as the standard unit of field-length measurement in American, Canadian and association football. There're corresponding units of area… (More on Yard)