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How Big Is a Proxima Centauri?

A proxima Centauri is about 134,000 miles (215,000 km) across. That is about 126 million times as wide as the average man is tall. The closest star to the Sun, a small red dwarf.

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How big is a proxima Centauri compared to the average man?

A proxima Centauri is about 126 million times as wide as the average man is tall. A proxima Centauri is 126 million× the size of the average man: about 126 million average men lined up would match it. By volume, about 82.5 septillion (8.2 × 10²⁵) average men would fit inside a proxima Centauri.

Proxima Centauri size facts

Proxima Centauri is about 215,000 km across, only about 1.5 times wider than Jupiter.
It is 4.24 light-years away.

How does a proxima Centauri compare to other things?

A proxima Centauri next to 23 things of similar size, plus some everyday references:

Thing	Size	Compared to Proxima Centauri
VY Canis Majoris	13.2 AU across	9,210× bigger
Betelgeuse	7.09 AU across	4,930× bigger
Rigel	0.735 AU across	512× bigger
Sagittarius A* (black hole)	15,800,000 miles (25,400,000 km) across	118× bigger
Sirius A	1,480,000 miles (2,380,000 km) across	11.1× bigger
Sun	865,000 miles (1,393,000 km) across	6.5× bigger
Jupiter	86,900 miles (139,800 km) across	46,700 miles (75,180 km) smaller
Saturn	72,400 miles (116,500 km)	61,200 miles (98,540 km) smaller
Uranus	31,500 miles (50,720 km) across	4.2× smaller
Neptune	30,600 miles (49,240 km) across	4.4× smaller
Earth	7,920 miles (12,740 km) across	16.9× smaller
Venus	7,520 miles (12,100 km) across	17.8× smaller
Mars	4,210 miles (6,779 km) across	31.7× smaller
Mercury	3,030 miles (4,879 km) across	44.1× smaller
Moon	2,160 miles (3,475 km) across	61.9× smaller
Pluto	1,480 miles (2,377 km) across	90.5× smaller
Ceres	584 miles (940 km) across	229× smaller
Olympus Mons (Mars)	13.6 miles (21.9 km)	9,820× smaller
Mount Everest	5.5 miles (8.849 km)	24,300× smaller
Eiffel Tower	1,083 ft (330 m)	652,000× smaller
School bus	40 ft (12.2 m) long	17.6 million× smaller
Average man (world)	5 ft 7 in (171 cm)	126 million× smaller
Average woman (world)	5 ft 3 in (159 cm)	135 million× smaller

Where do these numbers come from?

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