It's about 0.0000003 times as heavy as a Tree (Sierra Redwood)
In other words, 0.680 pounds is 0.000000240 times the weight of a Tree (Sierra Redwood), and the weight of a Tree (Sierra Redwood) is 4,200,000 times that amount.(a.k.a. Giant Sequoia, a.k.a. Sierran redwood, a.k.a. Wellingtonia, a.k.a. "Big Tree", Sequoiadendron giganteum)
The weight of wood in a Giant Sequoia is 2,900,000 pounds. General Sherman, a specimen in Sequoia National Park in Visalia, California, is the largest tree in the world by volume, with an estimated weight of about 4,200,000 pounds.
It's about 5,500,000 times as heavy as a Grain of Salt
In other words, 0.680 pounds is 5,270,000 times the weight of a Grain of Salt, and the weight of a Grain of Salt is 0.000000190 times that amount.The mass of a grain of salt is approximately 0.0000001290 pounds. Salt consumption varies widely by country; the people of the United States consume a combined total of about 126,000,000 pounds of salt each year.
It's about 0.00000003 times as heavy as The Eiffel Tower
In other words, 0.680 pounds is 0.00000003050 times the weight of The Eiffel Tower, and the weight of The Eiffel Tower is 32,800,000 times that amount.(a.k.a. La Tour Eiffel) (Paris, France) (total weight)
The Eiffel Tower weighs approximately 22,300,000 pounds. Architected to be quickly assembled, the Tower contains only 930 cu. meters of solid material.
It's about 0.00000003 times as heavy as The Brooklyn Bridge
In other words, 0.680 pounds is 0.000000023160 times the weight of The Brooklyn Bridge, and the weight of The Brooklyn Bridge is 43,180,000 times that amount.(a.k.a. New York and Brooklyn Bridge) (Manhattan and Brooklyn, New York City, New York) (total weight)
The total weight of the Brooklyn Bridge is approximately 29,370,000 pounds. In a promotional event to prove the bridge's stability shortly after it opened, entertainer P. T. Barnum led a parade of 21 elephants across it in May of 1884.
It's about 0.00000002 times as heavy as The Statue of Liberty
In other words, 0.680 pounds is 0.00000001250 times the weight of The Statue of Liberty, and the weight of The Statue of Liberty is 80,000,000 times that amount.(a.k.a. Liberty Enlightening the World, a.k.a. La Liberté éclairant le monde) (total weight, including foundation)
The total weight of the Statue of Liberty, including her base is roughly 54,200,000 pounds. The statue was designed using an optical trick known as "forced perspective" to make the statue appear proportionally correct when viewed from its base and is, in actuality, disproportionately large at the top.
It's about 0.000000003 times as heavy as The CN Tower
In other words, 0.680 pounds is 0.00000000261590 times the weight of The CN Tower, and the weight of The CN Tower is 382,280,000 times that amount.(a.k.a. La Tour CN, a.k.a. Canadian National Tower, a.k.a. Canada's National Tower) (Toronto, Canada)
The CN Tower weighs approximately 259,950,000 pounds. The Tower is home to the world's highest glass floor — a viewing area that allows visitors to look straight down 342 m (1,120 ft) to the ground below.
It's about 0.000000002 times as heavy as The Sears Tower
In other words, 0.680 pounds is 0.0000000015280 times the weight of The Sears Tower, and the weight of The Sears Tower is 654,500,000 times that amount.(officially "Willis Tower" as of 2009) (Chicago, Illinois)
The Willis Tower weighs approximately 444,900,000 pounds. The outer wall surface of the Tower is covered with black anodized aluminum panels which would total 110,000 sq. m (28 acres) if laid out together.