It's about as big as Missouri.
The "Show Me State," Missouri measures 18,053,330 hectares in total area. The Cathedral Room of Marvel Cave in Branson, Missouri measures roughly 534,750 cu. m (18,884,518.03 cu. ft) and was the site Don Piccard's hot air balloon flight which set the record for highest underground altitude.
It's about as big as Oklahoma.
In other words, the size of Oklahoma is 1.002782 times 18,053,330 hectares.(United States)
The "Sooner State," Oklahoma measures 18,103,550 hectares 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 as big as North Dakota.
In other words, the size of North Dakota is 1.014282 times 18,053,330 hectares.(United States)
The "Peace Garden State," North Dakota measures 18,311,160 hectares in total area. North Dakota contains the city of Rugby, said to be the geographic center of North America.
It's about as big as Washington.
In other words, the size of Washington is 1.022887 times 18,053,330 hectares.(United States)
The "Evergreen State," Washington measures 18,466,520 hectares in total area. Washington is home to Olympic National Park, a 350,000 hectares area that contains part of the Hoh Rainforest — the largest of only a few temperate rainforests in the United States.
It's about one-and-one-tenth times as big as Florida.
In other words, 18,053,330 hectares is 1.060067 times the size of Florida, and the size of Florida is 0.94333660 times that amount.(United States)
The "Sunshine State," Florida measures 17,030,360 hectares in total area. Florida has 1,067 km (663 mi) of oceanfront beaches and 1,926.38 km (1,197 mi) of coastline total.
It's about one-and-one-tenth times as big as Wisconsin.
In other words, 18,053,330 hectares is 1.064223 times the size of Wisconsin, and the size of Wisconsin is 0.93965270 times that amount.(United States)
The "Badger State," Wisconsin measures 16,963,860 hectares. The city of Green Bay, Wisconsin (and the Green Bay Metropolitan Statistical Area), the home of the National Football League's Green Bay Packers, is the smallest city by area to host an NFL team at just 14,070 hectares.
It's about nine-tenths as big as South Dakota.
In other words, 18,053,330 hectares is 0.90388310 times the size of South Dakota, and the size of South Dakota is 1.1063380 times that amount.(United States)
The "Mount Rushmore State," South Dakota measures 19,973,080 hectares in total area. The Black Hills mountain range area, contained within South Dakota and Wyoming, measures about 1,550,000 hectares.