The court is 78 feet from baseline to baseline (about 23.77 meters).
The overall size of a tennis doubles court is 36 feet wide by 78 feet long. The singles court is slightly narrower measuring 27 feet wide. Both singles and doubles courts share the same length. The service court fits inside the singles width of the court (27 feet wide) and extends back from the net 21 feet. The service court is divided in half with a center line marking the left and right service courts.
There is a 12 foot perimeter on each side (sidelines) and 21 feet back from each baseline.
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The length for a standard tennis court is 78 feet long, meaning there is 39 feet from the net to a baseline.
The court is 78 feet (23.77 metres) long. Its width is 27 feet (8.23 metres) for singles matches and 36 feet (10.97 metres) for doubles matches.