It's about 0.00000002 times as tall as Mount Everest
In other words, 128 microns is 0.0000000144651 times the height of Mount Everest, and the height of Mount Everest is 69,131,900 times that amount.(a.k.a. Mount Chomolungma, a.k.a. Sagarmatha, a.k.a. Mount Qomolangma, a.k.a. सगरमाथा, a.k.a. Chajamlungma, a.k.a. ཇོ་མོ་གླང་མ, a.k.a. 珠穆朗玛峰, a.k.a. Zhūmùlǎngmǎ Fēng) (Sagarmatha Zone, Nepal and Tibet, China) (to summit, excluding snow depth)
Mount Everest rises 8,848,860,000 microns above sea level at its summit. The plate tectonics of the Indian subcontinent continuously alter the mountain's peak â€” raising it by 4,000 microns and shifting it to the northeast by 4,500 microns each year.
It's about 0.00000002 times as tall as a Mauna Loa
In other words, 128 microns is 0.00000001396 times the height of a Mauna Loa, and the height of a Mauna Loa is 71,630,000 times that amount.(Hawaii) (Hawaiian island volcano) (total height from seafloor)
Mauna Loa, one of the five volcanoes which forms the island of Hawaii and the tallest mountain in total height in the world, rises to 9,200,000,000 microns above the seafloor. The peak of Loa is home to the approximately 6,000 sq. m (0.6 ha) Lake Waiau, one of the highest altitude lakes in the United States outside of Colorado.
It's about 0.00000001 times as tall as Maxwell Montes
In other words, 128 microns is 0.000000012 times the height of Maxwell Montes, and the height of Maxwell Montes is 83,000,000 times that amount.(Ishtar Terra, Venus)
Maxwell Montes rises to a total height of 11,000,000,000 microns. 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 0.00000001 times as deep as The Challenger Deep (Marianas Trench)
In other words, 128 microns is 0.000000011741 times the depth of The Challenger Deep (Marianas Trench), and the depth of The Challenger Deep (Marianas Trench) is 85,172,000 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 10,902,000,000 microns below sea level. The first manned expedition to the bottom of Challenger Deep took 4 hours and 48 minutes in 1960. This was the only manned descent to the floor of the Trench until 2012, when director James Cameron made the trip; several other descents have been made since then.
It's about 0.000000005 times as tall as Olympus Mons
In other words, 128 microns is 0.0000000047 times the height of Olympus Mons, and the height of Olympus Mons is 210,000,000 times that amount.(a.k.a. Mount Olympus) (Mars)
The tallest mountain in the solar system, Olympus Mons rises to approximately 27,000,000,000 microns. 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 0.000000002 times as long as The Panama Canal
In other words, 128 microns is 0.0000000015 times the length of The Panama Canal, and the length of The Panama Canal is 670,000,000 times that amount.(Canal de Panamá) (Panama)
Connecting the Atlantic and Pacific Oceans across the Isthmus of Panama, the Canal measures 88,000,000,000 microns in length. Ships passing through the Canal are raised (and then lowered) 26,000,000 microns above sea level through the lock-and-dam system.
It's about 0.000000001 times as wide as The English Channel
In other words, 128 microns is 0.0000000012 times the width of The English Channel, and the width of The English Channel is 833,000,000 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 107,000,000,000 microns, 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.