It's about 0.0000010 times as tall as The Challenger Deep (Marianas Trench).
In other words, 0.40 inches is 0.000000931940 times the height of The Challenger Deep (Marianas Trench), and the height of The Challenger Deep (Marianas Trench) is 1,073,000 times that amount.(near Marianas Islands, a.k.a. Ladrones Islands, northwestern Pacific Ocean) (depth below sea level)
The Challenger Deep, at the southern end of the Marianas Trench, reaches a depth of 429,210 inches below sea level. There has been only one manned expedition to the bottom of Challenger Deep — a 1960 voyage that took 4 hours and 48 minutes to reach the bottom.
It's about 0.0000009 times as tall as Maxwell Montes.
In other words, 0.40 inches is 0.000000920 times the height of Maxwell Montes, and the height of Maxwell Montes is 1,100,000 times that amount.(Ishtar Terra, Venus)
Maxwell Montes rises to a total height of 430,000 inches. Since Venus does not seem to have the kind of tectonic activity which gives rise to mountains on Earth, the origin of the Venusian mountain remains the subject of some dispute.
It's about 0.0000004 times as tall as Olympus Mons.
In other words, 0.40 inches is 0.000000380 times the height of Olympus Mons, and the height of Olympus Mons is 2,600,000 times that amount.(a.k.a. Mount Olympus) (Mars)
The tallest mountain in the solar system, Olympus Mons rises to approximately 1,100,000 inches. The mountain has been known to astronomers since the nineteenth century because it is tall enough to rise above Mars' frequent dust storms.
It's about 7,000,000 times as long as a Glucose Molecule.
In other words, 0.40 inches is 6,800,000 times the length of a Glucose Molecule, and the length of a Glucose Molecule is 0.000000150 times that amount.(C6H12O6, a.k.a. grape sugar) (open chain form)
Am individual glucose molecule measures 0.0000000590 inches in its open-chain form. Glucose is the most common fuel source of energy in human biology, with 3.75 kilocalories of energy per gram.
It's about 0.0000001 times as long as The Panama Canal.
In other words, 0.40 inches is 0.000000120 times the length of The Panama Canal, and the length of The Panama Canal is 8,300,000 times that amount.(Canal de Panamá) (Panama)
Connecting the Atlantic and Pacific Oceans across the Isthmus of Panama, the Canal measures 3,500,000 inches in length. Ships passing through the Canal are raised (and then lowered) 1,000 inches above sea level through the lock-and-dam system.
It's about 0.00000010 times as long as The English Channel.
In other words, 0.40 inches is 0.0000000950 times the length of The English Channel, and the length of The English Channel is 10,500,000 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 4,210,000 inches, 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 0.00000009 times as long as The 405.
In other words, 0.40 inches is 0.000000087180 times the length of The 405, and the length of The 405 is 11,471,000 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 4,588,200 inches. The 405 is the most heavily-trafficed freeway in the United States, with an average speed as low as 8 kph during rush hours.