It's about one-fifty-thousandth as long as The Panama Canal
In other words, the length of The Panama Canal is 50,000 times 3.920 cubits.(Canal de Panamá) (Panama)
Connecting the Atlantic and Pacific Oceans across the Isthmus of Panama, the Canal measures 190,000 cubits in length. Ships passing through the Canal are raised (and then lowered) 57 cubits above sea level through the lock-and-dam system.
It's about one-sixty-thousandth as wide as The English Channel
In other words, 3.920 cubits is 0.00001670 times the width of The English Channel, and the width of The English Channel is 59,900 times that amount.(average width between Isle of Ushant and The Walde Lighthouse) (La Manche, Ärmelkanal, Mor Breizh, Mor Bretannek) (a.k.a. The Channel)
The English Channel measures between 234,000 cubits, narrowing as it flows northeast. The world speed record for a Channel crossing by swimmer was set by Australian Trent Grimsey in 2012, with a time of 6 hours, 55 minutes.
It's about one-sixty-five-thousandth as long as The 405
In other words, 3.920 cubits is 0.0000153790 times the length of The 405, and the length of The 405 is 65,024 times that amount.(a.k.a. I-405, Interstate 405, San DIego Freeway) (Southern California)
Running from Irvine to San Fernando, The 405 runs a total of 254,900 cubits. The 405 is the most heavily-trafficed freeway in the United States, with an average speed as low as 8 kph during rush hours.
It's about one-sixty-five-thousandth as long as Hadrian's Wall
In other words, the length of Hadrian's Wall is 67,000 times 3.920 cubits.(a.k.a. Roman Wall, a.k.a. The Wall, a.k.a. Vallo di Adriano, a.k.a. Vallum Aelium, a.k.a. Severus' Wall) (from North Tyneside, Tyne and Wear, England, United Kingdom to Cumbria, North West England, United Kingdom)
Hadrian's Wall, which crossed England form the North Sea to the Irish Sea during the time of Roman rule, measures 260,000 cubits (about 79 Roman miles). Roman soldiers — at one time up to 10,000 of them — only occupied Great Britain for about 246 years after the wall was built, after which time the local Brits began to take residence the wall's garrisons.
It's about 250,000 times as long as a Red Blood Cell
In other words, the length of a Red Blood Cell is 0.00000420 times 3.920 cubits.(a.k.a. RBCs, a.k.a. haematids, a.k.a. erythrocyte, a.k.a. erythroid cells, a.k.a. red blood corpuscles)
An average Red Blood Cell measures 7.5 µm (micrometers) in diameter. An average human has 20 - 30 trillion red blood cells in their body and each cell completes a circulatory lap in about 20 seconds.
It's about one-two-hundred-fifty-thousandth as long as The Grand Canyon
In other words, 3.920 cubits is 0.000004020 times the length of The Grand Canyon, and the length of The Grand Canyon is 249,000 times that amount.(a.k.a. Gran Cañón) (Arizona) (Colorado River miles measure)
The Grand Canyon has a total length of 976,000 cubits along the course of the Colorado River at its bottom. Having opened in early 2007, the Grand Canyon Skywalk allows tourists to stand on a horseshoe-shaped glass walkway 2,410 cubits above the floor of Granite Gorge.
It's about 300,000 times as long as a Cell's Nucleus
In other words, the length of a Cell's Nucleus is 0.00000330 times 3.920 cubits.(for animal cell)
The nucleus of an animal cell measures an average of 0.0000130 cubits. The nucleus is the largest organelle in these cells, accounting for about 10% of the cell's total volume.