It's about as big as a Ballpoint Pen Tip.
(a.k.a. Biro, a.k.a. ball pen, a.k.a. dot pen) (for medium tip)
It's about one-one-hundredth as big as a Nailhead.
In other words, 0.00000000017 feddans is 0.009186 times the size of a Nailhead, and the size of a Nailhead is 108.9 times that amount.(for 11-gauge wire nai)
An 11-gauge nailhead measures 0.00000001851 feddans. Nails have been used since ancient times; archaeologists have discovered Ancient Egyptian nails that are over 5,000 years old.
It's about one-three-hundred-fiftieth as big as a Dime.
In other words, 0.00000000017 feddans is 0.002835 times the size of a Dime, and the size of a Dime is 352.7 times that amount.(United States ten-cent coin) (a.k.a. Roosevelt dime)
It's about one-four-hundredth as big as a Penny.
In other words, 0.00000000017 feddans is 0.00251 times the size of a Penny, and the size of a Penny is 398 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 0.0000000678 feddans.
It's about one-five-hundredth as big as a Nickel.
In other words, 0.00000000017 feddans is 0.002021 times the size of a Nickel, and the size of a Nickel is 494.8 times that amount.(United States five-cent coin) (a.k.a. Jefferson nickel)
It's about one-five-hundredth as big as a Postage Stamp.
In other words, the size of a Postage Stamp is 500 times 0.00000000017 feddans.(average; United States dimensions)
It's about one-six-hundred-fiftieth as big as a Quarter.
In other words, 0.00000000017 feddans is 0.001545 times the size of a Quarter, and the size of a Quarter is 647.2 times that amount.(United States quarter-dollar coin) (a.k.a. Quarter dollar, a.k.a. Washington quarter, a.k.a. two bits)