Tennis is played on a rectangular, flat surface. All court measurements are made to the outside of the lines. The overall size of the court is 78 feet long and 36 feet wide.
The courts width for singles play is 27 feet wide making the court 2106 square feet.
For doubles play the court is 36 feet wide making the court 2808 square feet.
That makes the doubles alley 4.5 feet wide on each side.
A net is stretched across the full width of the court, parallel with the baselines, dividing it into two equal parts making each half of the court 39 feet long.
The service line is 21 feet from the net and is 27 feet wide, reaching across only to the singles side line.
The center line in the middle of the service box divides it into two equal parts making the dimensions of each service box 21 feet long and 13.5 feet wide.
The distance between the service line and the baseline is 18 feet.
It is recommended that the fence be at least 21 feet behind the baseline and at least 12 feet from the sidelines, although there is no set standard. This gives 7200 square feet of total playing area.
Courts are generally given a North/South orientation to avoid the glare of the sun close to sunrise and sunset.