It's about as big as Alaska
It's about two-and-a-half times as big as Texas
In other words, 1,717,854,300 dunams is 2.46952580 times the size of Texas, and the size of Texas is 0.404936040 times that amount.(United States)
The "Lone Star State," Texas measures 695,621,130 dunams in total area. Texas covers so much area that Texarkana — a city in the state's northeastern corner — is about 30 km closer to Chicago, Illinois, than it is to El Paso — in the western corner of Texas.
It's about four times as big as California
In other words, 1,717,854,300 dunams is 4.0518339 times the size of California, and the size of California is 0.246801820 times that amount.(United States)
The "Golden State," California measures 423,969,580 dunams in total area. California is home to both the highest point — Mt. Whitney at 4,421 m (14,505 ft) — and lowest point — Death Valley at 85.5 m (282 ft) below sea level — in the continental United States, the two of which are separated by just 123 km (76 mi).
It's about four-and-a-half times as big as Montana
In other words, 1,717,854,300 dunams is 4.51072110 times the size of Montana, and the size of Montana is 0.221694040 times that amount.(United States)
The "Treasure State," Montana measures 380,838,070 dunams in total area. The northwest corner of Montana is home to Flathead Lake, the largest freshwater lake in the continental United States with a surface area of 496,000 dunams.
It's about five times as big as The Great Barrier Reef
In other words, 1,717,854,300 dunams is 4.940 times the size of The Great Barrier Reef, and the size of The Great Barrier Reef is 0.2020 times that amount.(a.k.a. Barrier Reef) (Coral Sea, off Queensland, Australia) (approximate)
The Great Barrier Reef, the largest such reef in the world, covers about 348,000,000 dunams. Reefs, such as the Great Barrier, grow in diameter at a rate of 1 to 3 cm per year.
It's about one-fifth as big as Brazil
In other words, 1,717,854,300 dunams is 0.20174740 times the size of Brazil, and the size of Brazil is 4.9566930 times that amount.(a.k.a. Brasil, formally the Federative Republic of Brazil, a.k.a. Rep&blica Federativa do Brasil)
Brazil measures 8,514,877,000 dunams in total area. Brazil is the world's fifth-largest country by area and eighth-largest economy (by GDP).
It's about one-fifth as big as China
In other words, 1,717,854,300 dunams is 0.17899980 times the size of China, and the size of China is 5.5865980 times that amount.(a.k.a. People's Republic of China, a.k.a. 中华人民共和国, a.k.a.中華人民共和國 , a.k.a. Zhōnghuá Rénmín Gònghég) (UN mainland area figure)
Mainland China, as measured by the United Nations (excluding China's Special Administrative Regions — Hong Kong and Macau — and disputed territories such as Taiwan, Askai Chin, and the Trans-Karakoram Tract), occupies 9,596,961,000 dunams in total area . China is the the most populous country in the world and the third or fourth largest (depending on areas included in the measurement) in total area.