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How Big Is a Tennis Ball?

A tennis ball is about 2.6 in (6.7 cm) across. That is about 26 times smaller than the average man. A regulation tennis ball.

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How big is a tennis ball compared to the average man?

A tennis ball is about 26 times smaller than the average man. The average man is 25.5× the size of a tennis ball: about 26 tennis balls stacked up would match it. By volume, about 401 tennis balls would fit inside the average man.

Tennis Ball size facts

A tennis ball is about 6.7 cm (2.6 in) across.

How does a tennis ball compare to other things?

A tennis ball next to 25 things of similar size, plus some everyday references:

Thing	Size	Compared to Tennis ball
Sun	865,000 miles (1,393,000 km) across	20.8 billion× bigger
Earth	7,920 miles (12,740 km) across	190 million× bigger
Mount Everest	5.5 miles (8.849 km)	132,000× bigger
Eiffel Tower	1,083 ft (330 m)	4,930× bigger
School bus	40 ft (12.2 m) long	182× bigger
Average man (world)	5 ft 7 in (171 cm)	25.5× bigger
Average woman (world)	5 ft 3 in (159 cm)	23.7× bigger
Goliath birdeater	11 in (28 cm) long	4.2× bigger
Basketball	9.4 in (24 cm) across	3.6× bigger
Soccer ball	8.7 in (22 cm) across	3.3× bigger
Bowling ball	8.6 in (21.8 cm) across	3.3× bigger
Dwarf lanternshark	7.9 in (20 cm) long	5.2 in (13.3 cm) bigger
Pencil	7.5 in (19 cm) long	4.8 in (12.3 cm) bigger
Banana	7.1 in (18 cm) long	4.4 in (11.3 cm) bigger
House mouse	6.7 in (17 cm) long	4.1 in (10.3 cm) bigger
Smartphone	5.8 in (14.7 cm)	3.1 in (8 cm) bigger
Monarch butterfly	3.9 in (10 cm) long	1.3 in (3.3 cm) bigger
Credit card	3.4 in (8.56 cm) long	0.73 in (1.86 cm) bigger
Apple	3.1 in (8 cm) long	0.51 in (1.3 cm) bigger
Baseball	2.9 in (7.4 cm) across	0.28 in (7 mm) bigger
Wolf spider	2.4 in (6 cm) long	0.28 in (7 mm) smaller
Bee hummingbird	2.2 in (5.5 cm) long	0.47 in (1.2 cm) smaller
Golf ball	1.7 in (4.27 cm) across	0.96 in (2.43 cm) smaller
US quarter	0.96 in (2.43 cm) across	1.7 in (4.27 cm) smaller
Honeybee	0.59 in (1.5 cm) long	4.5× smaller

Where do these numbers come from?

Sizes are typical adult or reported values, rounded for readability. Read how we measure and compare sizes.