Tennis court
23.77 m (77.99 ft)
Length, baseline to baseline
A doubles tennis court seen from above, measured baseline to baseline. 78 ft (23.77 m) long.
Published
How big is that?
23.77 m is 14 times an adult man and 48% of an Olympic pool.
Tennis court is the 14th largest of the 39 Classic objects, and the 50th largest of the 109 objects across all three SizeItUp games.
Closest in size from the other games: James Webb Space Telescope (Sunshield) (Cosmic Scale), 21.197 m and Diplodocus (Dippy, NHM London) (Prehistoric Giants), 26 m long.
Size comparison
To scale, smallest to largest: Tennis court in orange beside the Classic objects nearest in size, in teal.
| Object | Size | vs Tennis court |
|---|---|---|
| Mount Rushmore (Washington's head)George Washington's carved head, measured from chin to the top of the head. | 18.3 m tall | 77% of the size |
| Cricket pitchThe strip between the wickets, seen from above. | 20.12 m long | 85% of the size |
| Tennis court | 23.77 m long | – |
| Basketball court (FIBA)An international basketball court seen from above. | 28 m long | 1.2× bigger |
| Christ the Redeemer (Statue only)The statue above Rio de Janeiro, not counting its 8 m pedestal. | 30 m tall | 1.3× bigger |
In other units
| Centimetres | 2,377 |
|---|---|
| Metres | 23.77 |
| Inches | 935.8 |
| Feet | 77.99 |
| Yards | 26 |
How it's measured
Length, baseline to baseline. ITF Rules of Tennis 2026, Rule 1.
Sources
- itftennis.com: ITF Rules of Tennis 2026, Rule 1: the court shall be a rectangle, 78 feet (23.77 m) long.
- usta.com (supporting): USTA reprint of the ITF rule, same wording.
Checked against the source on .
Could you have guessed it by eye?
Tennis court is one of the objects in Classic, a daily size comparison game: you stretch a shape to the size you think is right beside one you know.