How long is 641.1 hands?
It's about one-sixty-thousandth as long as The Mississippi River

The length of The Mississippi River is about 37,070,000 hands.
(from Lake Itasca, Minnesota through Pilottown, Plaquemines Parish, Louisiana)
It's about one-seventy-thousandth as long as The Distance from L.A. to New York

The length of The Distance from L.A. to New York is about 44,200,000 hands.
(Los Angeles, California to New York City, New York) (via I-10 E, I-15 N, I-70 E, I-76 E, I-80 E, I-280 E)
It's about one-seventy-thousandth as long as I-80

The length of I-80 is about 45,649,900 hands.
(a.k.a. Interstate 80, a.k.a. Keystone Shortway) (net length)
It's about one-ninety-five-thousandth as long as The Great Wall of China (wall only)

The length of The Great Wall of China (wall only) is about 61,600,000 hands.
(长城, 長城, Chángchéng, a.k.a. 万里长城, 萬里長城, Wànlǐ Chángchéng) (a.k.a. "The long wall of 10,000 Li") (from Shanhaiguan through Lop Nur, China) (wall segments only)
It's about one-one-hundred-thousandth as long as The Amazon River
The length of The Amazon River is about 63,360,000 hands.
(from Nevado Mismi, Arequipa, Peru through near Marajó, Brazil) (approximate distance)
It's about one-one-hundred-fifty-thousandth as long as The Great Wall of China (total)

The length of The Great Wall of China (total) is about 87,100,000 hands.
(长城, 長城, Chángchéng, a.k.a. 万里长城, 萬里長城, Wànlǐ Chángchéng) (a.k.a. "The long wall of 10,000 Li") (from Shanhaiguan through Lop Nur, China) (total length, all branches)
It's about one-two-hundred-thousandth as long as The Diameter of Earth
The length of The Diameter of Earth is about 125,553,870 hands.
(Equatorial)
It's about one-six-hundred-thousandth as long as The Circumfrence of Earth
The length of The Circumfrence of Earth is about 394,439,110 hands.
(Equatorial)
It's about 650,000 times as wide as a Strand of Hair
The width of a Strand of Hair is about 0.00097 hands.
(average)
It's about 700,000 times as tall as a sheet of Paper
The height of a sheet of Paper is about 0.001 hands.
(for US Letter, a.k.a. ANSI A; 215.9mm by 279.4mm (8.5 in x 11 in); 20lb)
It's about 0.0000002 times as long as The Distance from Earth to the Moon
The length of The Distance from Earth to the Moon is about 3,783,824,000 hands.
(a.k.a. Luna) (median of semi-major axis, or apigee, and semi-minor axes, or perigee)
It's about 8,500,000 times as long as a Red Blood Cell
The length of a Red Blood Cell is about 0.0000740 hands.
(a.k.a. RBCs, a.k.a. haematids, a.k.a. erythrocyte, a.k.a. erythroid cells, a.k.a. red blood corpuscles)
It's about 10,000,000 times as long as a Cell's Nucleus
The length of a Cell's Nucleus is about 0.0000590 hands.
(for animal cell)
It's about 35,000,000 times as long as a Bacterium
The length of a Bacterium is about 0.0000200 hands.
(Escherichia coli) (rod-shaped configuration)
It's about 35,000,000 times as long as a Mitochondrion
The length of a Mitochondrion is about 0.00001850 hands.
(Eukaryotic; average)