
It's about as big as a Postage Stamp
(average; United States dimensions)
A typical postage stamp measures an average of 0.0000000400 hectares. One of the most prized stamps among collectors is the USissued "Inverted Jenny" stamp printed in 1918, which features an upsidedown image of Curtiss JN4 ("Jenny") airplane; a single stamp sold for $977,500 at a 2007 auction.
It's about as big as a Quarter
(United States quarterdollar coin) (a.k.a. Quarter dollar, a.k.a. Washington quarter, a.k.a. two bits)
The George Washington quarter, in circulation in various forms since 1932, has a diameter of 24.26 mm (0.955 in) and an area of 0.000000046220 hectares.
It's about oneandthreetenths times as big as a Nickel
In other words, 0.000000046220 hectares is 1.3080 times the size of a Nickel, and the size of a Nickel is 0.76450 times that amount.
(United States fivecent 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 0.000000035330 hectares.
It's about oneandthreefifths times as big as a Penny
In other words, 0.000000046220 hectares is 1.620 times the size of a Penny, and the size of a Penny is 0.6170 times that amount.
(United States onecent 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 0.00000002850 hectares.
It's about threefifths as big as a Secure Digital (SD) card
In other words, the size of a Secure Digital (SD) card is 1.70 times 0.000000046220 hectares.
A Secure Digital (SD) card measures 3.2 cm by 2.4 cm for a total area of 0.0000000770 hectares. SDXC Cards, the latest standard for the technology, will allow the cards to hold up to 2 terabytes of data.
It's about oneandfourfifths times as big as a Dime
In other words, 0.000000046220 hectares is 1.8350 times the size of a Dime, and the size of a Dime is 0.5450 times that amount.
(United States tencent coin) (a.k.a. Roosevelt dime)The dime, in its current design since 1946, has a diameter of 17.91 mm (0.705 in) and an area of 0.000000025190 hectares.
It's about six times as big as a Nailhead
In other words, 0.000000046220 hectares is 5.9450 times the size of a Nailhead, and the size of a Nailhead is 0.16820 times that amount.
(for 11gauge wire nai)An 11gauge nailhead measures 0.0000000077740 hectares. Nails have been used since ancient times; archaeologists have discovered Ancient Egyptian nails that are over 5,000 years old. 
