The yard equals 0.9144 meters exactly, or 3 feet. It is the standard field unit in American football (100-yard field) and British cricket (22-yard pitch). Fabric and textile in Anglo-Saxon countries is still sold by the yard. Historically the yard was said to be the length of King Henry I of England's arm.
Real-world: An NFL football field is 100 yards = 91.44 metres. A cricket pitch is 22 yards = 20.12 metres.
Read full yard reference โThe foot equals 30.48 centimeters exactly and is one of the oldest length units in human history. It is the international aviation standard for altitude โ commercial airliners cruise at 35,000 feet. In the US, building dimensions, human height and elevation are all expressed in feet. 1 foot = 12 inches.
Real-world: Airliners cruise at 35,000 ft (10.7 km). Mount Everest is 29,032 ft (8,849 m). A standard US ceiling is 8 ft (2.44 m).
Read full foot reference โ