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
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.
The net measures 3 feet 6 inches high at the ends and 3 feet high at the middle tape. Typically the net standards are placed 3 feet outside the outer lines of the doubles court, making the net length a total of 42 feet from pole to pole.
Distance from other Courts and Fencing
It is adviseable to have a distance of a 12 foot perimeter on each side of the sidelines and 21 feet from each baseline to create enough playing area inside fencing and adjacent tennis courts.