It's about one-one-hundred-fifty-thousandth as long as The English Channel
In other words, 4.20 shaftments is 0.000005980 times the length of The English Channel, and the length of The English Channel is 167,000 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 702,000 shaftments, 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-two-hundred-thousandth as long as The 405
In other words, 4.20 shaftments is 0.00000549240 times the length of The 405, and the length of The 405 is 182,070 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 764,700 shaftments. 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-two-hundred-thousandth as long as Hadrian's Wall
In other words, 4.20 shaftments is 0.00000530 times the length of Hadrian's Wall, and the length of Hadrian's Wall is 190,000 times that amount.(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 790,000 shaftments (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 300,000 times as long as an E. coli Bacterium
In other words, 4.20 shaftments is 320,000 times the length of an E. coli Bacterium, and the length of an E. coli Bacterium is 0.00000310 times that amount.(Escherichia coli) (rod-shaped configuration)
An rod-shaped E. coli bacterium measures about 0.0000130 shaftments in length. A staple of biology labs, E. coli can reproduce in as little as twenty minutes.
It's about 350,000 times as long as a Mitochondrion
In other words, the length of a Mitochondrion is 0.000002940 times 4.20 shaftments.(Eukaryotic; average)
A mitochondrion measures between 0.75 and 3 micrometers (Âµm). The mitochondrion is commonly referred to as the powerhouse of the cell, responsible for the generation of ATP. The size, shape, and distribution of mitochondria varies widely, with human liver cells each having 1,000 to 2,000 mitochondria.
It's about one-seven-hundred-thousandth as long as The Grand Canyon
In other words, 4.20 shaftments is 0.000001440 times the length of The Grand Canyon, and the length of The Grand Canyon is 694,000 times that amount.(a.k.a. Gran Cañón) (Arizona) (Colorado River miles measure)
The Grand Canyon has a total length of 2,930,000 shaftments 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 7,220 shaftments above the floor of Granite Gorge.
It's about 0.0000005 times as long as The Rhine
In other words, 4.20 shaftments is 0.0000004850 times the length of The Rhine, and the length of The Rhine is 2,060,000 times that amount.(a.k.a. Rhein, a.k.a. Rijn, a.k.a. Rhin, a.k.a. Rain, a.k.a. Reno, a.k.a. Rhenus, a.k.a. Ryn) (from near Reichenau, Switzerland through Hoek van Holland, Rotterdam, Netherlands)
The Rhine river runs 8,660,000 shaftments in total length. The World War II Battle of Arnhem, as memorialized in the 1974 book and 1977 movie A Bridge Too Far, was the first of several attempts to capture key bridges across the Rhine, beginning with the Arnhem Bridge in the Netherlands.