It's about as big as San Marino
(a.k.a. The Most Serene Republic of San Marino, a.k.a. Serenissima Repubblica di San Marino)
an Marino is an enclave country located within the Apennine Mountains in Italy, with a total area of 61,000 dunams. Established in 301 CE, San Marino is the oldest sovereign state in the world.
It's about nine-tenths as big as Coron Island
In other words, 61,000 dunams is 0.860 times the size of Coron Island, and the size of Coron Island is 1.20 times that amount.(Calamian Islands, Palawan, Philippines)
A popular tourist destination, Coron Island, measures about 71,000 dunams in total area. The rocky offshore area of the island makes it popular for shipwreck diving, with some wrecks as shallow as 10 ft. under the water.
It's about one-and-three-tenths times as big as The Pitcairn Islands
In other words, the size of The Pitcairn Islands is 0.770 times 61,000 dunams.(a.k.a. Pitcairn, Henderson, Ducie and Oeno Islands, a.k.a. Pitkern Ailen) (British overseas territory) (total land area)
The Pitcairn Islands are a group of four islands which have a combined area of 47,000 dunams. A British overseas territory since 1838, the island is populated by the descendents of mutineers and others who traveled on the British Royal Naval Ship, HMS Bounty during her 1789-1790 voyage.
It's about one-and-three-fifths times as big as Rock Island
In other words, 61,000 dunams is 1.55520 times the size of Rock Island, and the size of Rock Island is 0.6430 times that amount.(a.k.a. Arsenal Island, a.k.a. Rock Island Arsenal) (Illinois, on the Iowa border) (land area only)
Rock Island measures 39,220 dunams in total area. It is known as the largest government-owned weapons manufacturing arsenal in the United States and the US Army's only active foundry, as well as a former Union prison camp during the American Civil War.
It's about three-fifths as big as Disney World
In other words, 61,000 dunams is 0.6040 times the size of Disney World, and the size of Disney World is 1.660 times that amount.(a.k.a. Walk Disney World Resort, a.k.a. Walt Disney World, a.k.a. WDW) (Lake Buena Vista and Bay Lake, Florida) (total site)
Disney World currently occupies 101,000 dunams. Part of the former total area of 120,000 dunams now comprises the Disney planned community of Celebration, Florida.
It's about three-fifths as big as Hilton Head
In other words, 61,000 dunams is 0.5603420 times the size of Hilton Head, and the size of Hilton Head is 1.784620 times that amount.(a.k.a. Hilton Head Island) (South Carolina)
Hilton Head Island measures 108,860 dunams in total land area. The island (and city of the same name) is located in the Atlantic Ocean and is known as popular vacation destination.
It's about two times as big as Inis Mór
In other words, the size of Inis Mór is 0.50 times 61,000 dunams.(a.k.a. Inishmore, a.k.a. Árainn Mhór, a.k.a. Inis Bant, a.k.a. Árainn na Naomh) (Connacht, Ireland)
The largest of the Aran Islands, Inis Mór measures 31,000 dunams. The west side of the island is home to the Poll na bPéist, a.k.a. the wormhole, a naturally-formed, 0.290 dunams, rectangular pool on the island's cliffside.