It's about twenty-and-a-half times as big as Sydney
In other words, 253,336,000 dunams is 20.48370 times the size of Sydney, and the size of Sydney is 0.0488193 times that amount.(a.k.a. Cadi) (Greater Sydney region) (Australia)
The region of Greater Sydney, the largest city of Oceania, measures 12,367,700 dunams. The Royal National Park, in Sutherland Shire, located in the southern part of the city, is the second oldest national park in the world and covers 132,000 dunams.
It's about twenty times as big as Hawaii (Island)
In other words, 253,336,000 dunams is 24.28330 times the size of Hawaii (Island), and the size of Hawaii (Island) is 0.0411806 times that amount.(a.k.a. Hawaii, a.k.a. The Big Island) (Hawaii)
The largest of the main Hawaiian Islands and the largest island in the United States, Hawaii measures 10,432,500 dunams in total area. It is known for its continuously erupting (for the past two decades, as of 2011) volcano, Kīlauea, and for the black sand beaches formed by the lava flow.
It's about one-thirty-fifth as big as Brazil
In other words, 253,336,000 dunams is 0.02975216 times the size of Brazil, and the size of Brazil is 33.611010 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 forty times as big as Ottawa
In other words, 253,336,000 dunams is 37.43470 times the size of Ottawa, and the size of Ottawa is 0.0267132 times that amount.(a.k.a. Ville d'Ottawa) (Ottawa metropolitan area) (Canada)
The capital and fourth-largest city of Canada, Ottawa measures 6,767,410 dunams. For many years, the skyline of Ottawa was dominated by the Peace Tower (la Tour de la Paix), with city ordinances preventing other structures from exceeding its 92.2 m height.
It's about one-fortieth as big as China
In other words, 253,336,000 dunams is 0.02639752 times the size of China, and the size of China is 37.882350 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.
It's about one-fortieth as big as United States
In other words, 253,336,000 dunams is 0.02578044 times the size of United States, and the size of United States is 38.78910 times that amount.(a.k.a. United States of America, a.k.a. America, a.k.a. USA, a.k.a. US)
The third or fourth largest country in the world (there is some dispute in how China's total area is measured), the United States measures 9,826,675,000 dunams in total area. The United States' economy is the fifth-largest in the world, comprising a quarter of nominal global GDP.
It's about one-fortieth as big as Canada
In other words, 253,336,000 dunams is 0.0253725 times the size of Canada, and the size of Canada is 39.41280 times that amount.Canada measures 9,984,670,000 dunams in total area. It is both the second-largest country in the world and one of the most-sparsely populated, in addition to having the longest coastline of any country in the world — 243,000 km (151,000 mi).