Tennis court
The dimensions are set as the standard for lawn tennis by the International Tennis Federation and written down in the 'Rules of Tennis' document.  The Tennis court is 78 feet (23.77 meters) long. Its width is 27 feet (8.23 meters) for singles matches and 36 feet (10.97 meters) for doubles matches.  The service line is 21 feet (6.40 meters) from the net.