It's about as big as a Postage Stamp
(average; United States dimensions)
A typical postage stamp measures an average of 0.000000400 dunams. One of the most prized stamps among collectors is the US-issued "Inverted Jenny" stamp printed in 1918, which features an upside-down image of Curtiss JN-4 ("Jenny") airplane; a single stamp sold for $977,500 at a 2007 auction.
It's about as big as a Quarter
It's about one-and-three-tenths times as big as a Nickel
In other words, 0.00000046220 dunams is 1.3080 times the size of a Nickel, and the size of a Nickel is 0.76450 times that amount.(United States five-cent coin) (a.k.a. Jefferson nickel)
The nickel, in its current design since 1938, has a diameter of 21.21 mm (0.835 in) and an area of 0.00000035330 dunams.
It's about one-and-three-fifths times as big as a Penny
In other words, 0.00000046220 dunams is 1.620 times the size of a Penny, and the size of a Penny is 0.6170 times that amount.(United States one-cent coin) (a.k.a. Lincoln penny, a.k.a. Cent, a.k.a. One cent piece)
The Lincoln penny, in its current design since 1909, has a diameter of 19.05 mm (0.75 in) and an area of 0.0000002850 dunams.
It's about three-fifths as big as a Secure Digital (SD) card
It's about one-and-four-fifths times as big as a Dime
It's about six times as big as a Nailhead
In other words, 0.00000046220 dunams is 5.9450 times the size of a Nailhead, and the size of a Nailhead is 0.16820 times that amount.(for 11-gauge wire nai)
An 11-gauge nailhead measures 0.000000077740 dunams. Nails have been used since ancient times; archaeologists have discovered Ancient Egyptian nails that are over 5,000 years old.