It's about as big as Fort Bliss
(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 one-and-one-tenth times as big as Kangaroo Island
In other words, 453,000 hectares is 1.028 times the size of Kangaroo Island, and the size of Kangaroo Island is 0.97280 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 Grand Canyon National Park
In other words, 453,000 hectares is 0.9187539810 times the size of Grand Canyon National Park, and the size of Grand Canyon National Park is 1.08843066 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 nine-tenths as big as Calgary
In other words, 453,000 hectares is 0.8864610 times the size of Calgary, and the size of Calgary is 1.128080 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-tenth times as big as Rhode Island
In other words, 453,000 hectares is 1.132030 times the size of Rhode Island, and the size of Rhode Island is 0.8833690 times that amount.(a.k.a. The State of Rhode Island and Providence Plantations, a.k.a. RI) (United States)
The "Ocean State," Rhode Island measures 400,166 hectares in total area. Several large bays totaling 270,600 hectares make up 32.4% of its total area.
It's about four-fifths as big as Prince Edward Island
In other words, 453,000 hectares is 0.7969870 times the size of Prince Edward Island, and the size of Prince Edward Island is 1.254730 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.
It's about seven-tenths as big as Tshwane
In other words, 453,000 hectares is 0.71140 times the size of Tshwane, and the size of Tshwane is 1.4060 times that amount.(a.k.a. Pretoria, a.k.a. ePitoli, a.k.a. Jacaranda City) (Gauteng, South Africa) (for Tshwane metro area)
Tshwane, South Africa's executive capital, measures 636,800 hectares in total metro area. The Reserve Bank of South Africa is the city's tallest building at 150 m in height.