It's about 2,000,000 times as big as an Airplane Tray Table.
In other words, 200 dunams is 1,980,000 times the size of an Airplane Tray Table, and the size of an Airplane Tray Table is 0.000000505 times that amount.(average)
With wide variation among different models of airplanes, in-flight tray tables measure around 41.2 cm (16.5 in) x 24.1 cm (9.5 in) for a total area of 0.000101 dunams. Flight safety rules require that the tray tables be upright and locked during takeoff and landing so as to reduce the risk of passenger abdominal injury.
It's about 0.0000005 times as big as California.
In other words, 200 dunams is 0.00000047173196 times the size of California, and the size of California is 2,119,847.9 times that amount.(United States)
The "Golden State," California measures 423,969,580 dunams in total area. California is home to both the highest point — Mt. Whitney at 4,421 m (14,505 ft) — and lowest point — Death Valley at 85.5 m (282 ft) below sea level — in the continental United States, the two of which are separated by just 123 km (76 mi).
It's about 0.0000003 times as big as Texas.
In other words, 200 dunams is 0.00000028751283 times the size of Texas, and the size of Texas is 3,478,105.7 times that amount.(United States)
The "Lone Star State," Texas measures 695,621,130 dunams in total area. Texas covers so much area that Texarkana — a city in the state's northeastern corner — is about 30 km closer to Chicago, Illinois, than it is to El Paso — in the western corner of Texas.
It's about 5,000,000 times as big as an Apple iPad.
In other words, 200 dunams is 4,998,000 times the size of an Apple iPad, and the size of an Apple iPad is 0.0000002001 times that amount.(for 9.7 inch, Apple iPad Air MD785LL/B)
An Apple iPad measures 23 cm (9.4 in) x 17 cm (6.6 in) for a total device area of 0.00004002 dunams. The base model iPad Air features 16 GB of storage capacity.
It's about 0.0000001 times as big as Alaska.
In other words, 200 dunams is 0.00000011642431 times the size of Alaska, and the size of Alaska is 8,589,271.4 times that amount.(United States)
The "Last Frontier," Alaska measures 1,717,854,300 dunams 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 5,830,000 dunams.
It's about 35,000,000 times as big as a Playing Card.
It's about 35,000,000 times as big as a Post-it® Note (3M).
In other words, the size of a Post-it® Note (3M) is 0.000000027 times 200 dunams.(3M) (generically sticky notes, a.k.a. repositionable notes, a.k.a. repositional notes)
A Post-it® Note measures 0.0000054 dunams in total area. In September, 1989, Hurricane Hugo swept through Charleston, South Carolina with winds up to 230 kph (140 mph), uprooting eight oak trees in Mr. Bruce Brakefield's yard, but leaving in place a Post-it® note attached to his front door.