It's about one-fifth as big as Oklahoma.
In other words, 31,000,000 dunams is 0.17123710 times the size of Oklahoma, and the size of Oklahoma is 5.8398560 times that amount.(United States)
The "Sooner State," Oklahoma measures 181,035,500 dunams in total area. Oklahoma has 89,553.56 km (55,646 mi) of shoreline along its lakes and ponds, including its 200 man-made lakes — the most of any state in the nation — surpassing the combined shoreline of the United States' Atlantic, Arctic, and Gulf Coasts by about 12,000 km (7,400 mi).
It's about one-fifth as big as North Dakota.
In other words, 31,000,000 dunams is 0.16929570 times the size of North Dakota, and the size of North Dakota is 5.9068250 times that amount.(United States)
The "Peace Garden State," North Dakota measures 183,111,600 dunams in total area. North Dakota contains the city of Rugby, said to be the geographic center of North America.
It's about one-fifth as big as Washington.
In other words, 31,000,000 dunams is 0.16787140 times the size of Washington, and the size of Washington is 5.9569410 times that amount.(United States)
The "Evergreen State," Washington measures 184,665,200 dunams in total area. Washington is home to Olympic National Park, a 3,500,000 dunams area that contains part of the Hoh Rainforest — the largest of only a few temperate rainforests in the United States.
It's about six times as big as Anchorage.
In other words, 31,000,000 dunams is 6.1019740 times the size of Anchorage, and the size of Anchorage is 0.16388140 times that amount.(formally the Municipality of Anchorage, a.k.a. MOA) (Alaska)
The fourth-largest city in Alaska and in the country, Anchorage measures 5,080,323 dunams in total area. The city is the home of a large energy industry, a hub for air and overseas cargo traffic, and home to nearly half of Alaska's population.
It's about six-and-a-half times as big as Grand Canyon National Park.
In other words, 31,000,000 dunams is 6.28727890 times the size of Grand Canyon National Park, and the size of Grand Canyon National Park is 0.1590513190 times that amount.(Coconino County and Mohave Counties, Arizona, near Fredonia and Grand Canyon, Arizona)
Containing the 446 km (277 mi) Grand Canyon gorge, Grand Canyon National Park covers 4,930,590 dunams.
It's about one-fifth as big as South Dakota.
In other words, 31,000,000 dunams is 0.15520890 times the size of South Dakota, and the size of South Dakota is 6.4429290 times that amount.(United States)
The "Mount Rushmore State," South Dakota measures 199,730,800 dunams in total area. The Black Hills mountain range area, contained within South Dakota and Wyoming, measures about 15,500,000 dunams.
It's about one-fifth as big as Nebraska.
In other words, 31,000,000 dunams is 0.15473290 times the size of Nebraska, and the size of Nebraska is 6.462750 times that amount.(United States)
The "Cornhusker State," Nebraska measures 200,345,200 dunams in total area. The Sand Hills region of sand dunes and prairie make up almost 25% of the state, or 50,760,000 dunams (according to the US Fish and Wildlife Service figures - other organizations define the area slightly differently).