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How Big Is a House Mouse?

A house mouse is about 6.7 in (17 cm) long. That is about 10 times smaller than the average man. A tiny rodent that lives alongside people almost everywhere.

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How big is a house mouse compared to the average man?

A house mouse is about 10 times smaller than the average man. The average man is 10.1× the size of a house mouse: about 10 house mouses stacked up would match it. By volume, about 3,160 house mouses would fit inside the average man.

House Mouse size facts

House mice are 7.5 to 10 cm long, plus a tail about as long again.
An adult weighs about 20 grams.

How does a house mouse compare to other things?

A house mouse next to 25 things of similar size, plus some everyday references:

Thing	Size	Compared to House mouse
Sun	865,000 miles (1,393,000 km) across	8.19 billion× bigger
Earth	7,920 miles (12,740 km) across	75 million× bigger
Mount Everest	5.5 miles (8.849 km)	52,100× bigger
Eiffel Tower	1,083 ft (330 m)	1,940× bigger
School bus	40 ft (12.2 m) long	71.8× bigger
Average man (world)	5 ft 7 in (171 cm)	10.1× bigger
Average woman (world)	5 ft 3 in (159 cm)	9.4× bigger
Chandra Bahadur Dangi	1 ft 9.5 in (55 cm)	3.2× bigger
Newborn baby	1 ft 7.5 in (50 cm)	1 ft 1 in (33 cm) bigger
American crow	1 ft 5.5 in (45 cm) long	11 in (28 cm) bigger
Goliath birdeater	11 in (28 cm) long	4.3 in (11 cm) bigger
Basketball	9.4 in (24 cm) across	2.8 in (7 cm) bigger
Soccer ball	8.7 in (22 cm) across	2 in (5 cm) bigger
Bowling ball	8.6 in (21.8 cm) across	1.9 in (4.8 cm) bigger
Dwarf lanternshark	7.9 in (20 cm) long	1.2 in (3 cm) bigger
Pencil	7.5 in (19 cm) long	0.79 in (2 cm) bigger
Banana	7.1 in (18 cm) long	0.39 in (10 mm) bigger
Smartphone	5.8 in (14.7 cm)	0.91 in (2.3 cm) smaller
Monarch butterfly	3.9 in (10 cm) long	2.8 in (7 cm) smaller
Credit card	3.4 in (8.56 cm) long	3.3 in (8.44 cm) smaller
Apple	3.1 in (8 cm) long	3.5 in (9 cm) smaller
Baseball	2.9 in (7.4 cm) across	3.8 in (9.6 cm) smaller
Tennis ball	2.6 in (6.7 cm) across	4.1 in (10.3 cm) smaller
Wolf spider	2.4 in (6 cm) long	4.3 in (11 cm) smaller
Bee hummingbird	2.2 in (5.5 cm) long	3.1× smaller

Where do these numbers come from?

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

Silhouettes from PhyloPic: House mouse by Kamil S. Jaron. See credits.