It's about as big as Rhode Island
It's about nine-tenths as big as Kangaroo Island
In other words, 400,166 hectares is 0.90840 times the size of Kangaroo Island, and the size of Kangaroo Island is 1.1010 times that amount.(a.k.a. Karta) (state of South Australia, Australia)
Kangaroo Island, off the southern coast of Australia, measures 440,500 hectares in total area. The island is famous for its ligurian bee colonies, exporting over 100 tonnes of honey each year.
It's about nine-tenths as big as Fort Bliss
In other words, 400,166 hectares is 0.8830 times the size of Fort Bliss, and the size of Fort Bliss is 1.130 times that amount.(near Las Cruces, New Mexico and El Paso, Texas)
Fort Bliss is the United States Army's second-largest installation with a total area of 453,000 hectares. It is known as the largest TRADOC (Training and Doctrine Command) site, the Army's largest maneuver area, and the country's largest contiguous tract of open airspace.
It's about four-fifths as big as Grand Canyon National Park
In other words, 400,166 hectares is 0.8115984670 times the size of Grand Canyon National Park, and the size of Grand Canyon National Park is 1.232136380 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 493,059 hectares.
It's about four-fifths as big as Calgary
In other words, 400,166 hectares is 0.7830720 times the size of Calgary, and the size of Calgary is 1.277020 times that amount.(Calgary metro) (Canada)
One of the largest cities in Canada, Calgary measures 511,021 hectares. Calgary has a large parks system, with 800 km of pathways connecting the city's various parks.
It's about one-and-one-third times as big as Yosemite National Park
In other words, 400,166 hectares is 1.322050 times the size of Yosemite National Park, and the size of Yosemite National Park is 0.7564010 times that amount.(Tuolumne, Mariposa, and Madera counties, California, near Mariposa, California) (total land area)
Famous for its granite cliffs and Giant Sequoia groves, Yosemite National Park is 302,687 hectares in total area, of which 20,800 hectares is the well-known Yosemite Valley. The Park is known as the home of Yosemite Falls — the highest waterfall in North America and sixth highest in the world at 739 m (2,420 ft)
It's about seven-tenths as big as Prince Edward Island
In other words, 400,166 hectares is 0.7040330 times the size of Prince Edward Island, and the size of Prince Edward Island is 1.420390 times that amount.(a.k.a. PEI, a.k.a. P.E.I., a.k.a. Île-du-Prince-Édouard, a.k.a. Eilean a' Phrionnsa, a.k.a. Garden of the Gulf, a.k.a. Birthplace of the Confederation, a.k.a. Île Saint-Jean)
Prince Edward Island, located off Canada's eastern coast in the Gulf of St. Lawrence, measures 568,391 hectares in total area. Significant among Prince Edward Island's industries is agriculture, with the island producing 1.3 billion kg (1.4 million tons) of potatoes each year — almost 21% the output of the US state of Idaho with 3% as much land.