It's about 500,000 times as big as a King Size Bed.
In other words, 500 feddans is 521,000 times the size of a King Size Bed, and the size of a King Size Bed is 0.00000192 times that amount.(North American/Australian standard; length; mattress only)
A King-Size mattress measures 0.000959 feddans in total area. Although most antique beds were smaller than modern beds, it was not uncommon for beds in the medieval Europe to reach 0.00119 feddans for those in positions of wealth or power.
It's about one-eight-hundred-thousandth as big as Alaska.
In other words, 500 feddans is 0.0000012226977 times the size of Alaska, and the size of Alaska is 817,863.65 times that amount.(United States)
The "Last Frontier," Alaska measures 408,931,820 feddans in total area. Alaska is home to over 100,000 glaciers — half of the world's total — including the Bering Glacier complex near the southeastern border of Alaska, which covers 1,387,820 feddans.
It's about 2,000,000 times as big as a Bath Towel.
In other words, 500 feddans is 1,938,000 times the size of a Bath Towel, and the size of a Bath Towel is 0.000000516 times that amount.(for Fieldcrest Luxury Solid Towels)
Bath towels typically measure 142.24 cm (56 in) by 76.2 cm (30 in), for a total area of about 0.000258 feddans. The city of Bursa, Turkey is known as the birthplace of the modern towel.
It's about 0.0000003 times as big as Brazil.
In other words, 500 feddans is 0.0000002466761 times the size of Brazil, and the size of Brazil is 4,053,899 times that amount.(a.k.a. Brasil, formally the Federative Republic of Brazil, a.k.a. Rep&blica Federativa do Brasil)
Brazil measures 2,026,950,000 feddans in total area. Brazil is the world's fifth-largest country by area and eighth-largest economy (by GDP).
It's about 0.0000002 times as big as China.
In other words, 500 feddans is 0.0000002188627 times the size of China, and the size of China is 4,569,075 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 2,284,538,000 feddans 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 0.0000002 times as big as United States.
In other words, 500 feddans is 0.0000002137464 times the size of United States, and the size of United States is 4,678,441 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 2,339,221,000 feddans in total area. The United States' economy is the fifth-largest in the world, comprising a quarter of nominal global GDP.
It's about 0.0000002 times as big as Canada.
In other words, 500 feddans is 0.000000210364 times the size of Canada, and the size of Canada is 4,753,670 times that amount.Canada measures 2,376,830,000 feddans 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).