How big is 77,000,000,000 square millimeters?
It's about 300,000,000 times as big as a US Dime
The size of a US Dime is about 251.90 square millimeters.
(United States ten-cent coin) (a.k.a. Roosevelt dime)
The dime, in its current design since 1946, has a diameter of 17.91 mm (0.705 in) and an area of 251.9 sq. mm.
It's about 1,000,000,000 times as big as a Nailhead
The size of a Nailhead is about 77.740 square millimeters.
(for 11-gauge wire nai)
An 11-gauge nailhead measures 77.740 square millimeters. Nails have been used since ancient times; archaeologists have discovered Ancient Egyptian nails that are over 5,000 years old.
It's about 0.0000000005 times as big as The Land area of Earth
The size of The Land area of Earth is about 148,940,000,000,000,000,000.00000000000000000000000000 square millimeters.
The Earth has a land area of 148,940,000,000,000,000,000.00000000000000000000000000 square millimeters. Only an estimated one-eighth of this area — or 18,618,000,000,000,000,000.0000000000000000000000000 square millimeters — is inhabitable by humans, with uninhabitable terrain such as deserts and high mountains covering the rest.
It's about 100,000,000,000 times as big as a Ballpoint Pen Tip
The size of a Ballpoint Pen Tip is about 0.70 square millimeters.
(a.k.a. Biro, a.k.a. ball pen, a.k.a. dot pen) (for medium tip)
The most common size of ballpoint pen — a medium-tip — measures 0.7 sq. mm. A typical ballpoint pen can write more than 8,500 m (28,000 ft) before running out of ink.