It's about one-seven-thousand-five-hundredth as tall as Mount Everest
In other words, 1,200 milimeters is 0.00013561 times the height of Mount Everest, and the height of Mount Everest is 7,374.0 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 milimeters above sea level at its summit. The plate tectonics of the Indian subcontinent continuously alter the mountain's peak â€” raising it by 4 mm and shifting it to the northeast by 4.5 mm each year.
It's about one-seven-thousand-five-hundredth as tall as a Mauna Loa
In other words, 1,200 milimeters is 0.000131 times the height of a Mauna Loa, and the height of a Mauna Loa is 7,639 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 milimeters 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 one-nine-thousandth as deep as The Challenger Deep (Marianas Trench)
In other words, 1,200 milimeters is 0.0001101 times the depth of The Challenger Deep (Marianas Trench), and the depth of The Challenger Deep (Marianas Trench) is 9,085.1 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 milimeters 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 one-nine-thousandth as tall as Maxwell Montes
In other words, 1,200 milimeters is 0.0001 times the height of Maxwell Montes, and the height of Maxwell Montes is 9,100 times that amount.(Ishtar Terra, Venus)
Maxwell Montes rises to a total height of 11,000,000 milimeters. 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 10,000 times as tall as a sheet of Paper
In other words, 1,200 milimeters is 10,000 times the height of a sheet of Paper, and the height of a sheet of Paper is 0.000 times that amount.(for US Letter, a.k.a. ANSI A; 215.9mm by 279.4mm (8.5 in x 11 in); 20lb)
A single sheet of 20 lb, 8.5 inch x 11 inch paper is just 0.004 caliper (0.1 mm) thick. This style of paper weighs a mere 5 g per sheet.
It's about 10,000 times as wide as a Strand of Hair
In other words, 1,200 milimeters is 12,000 times the width of a Strand of Hair, and the width of a Strand of Hair is 0.000083 times that amount.(average)
A strand of human hair averages 99 µm (micrometers), with blond hair being the finest and black hair the thickest. On a healthy scalp, each strand of hair will last up to 6 years.
It's about one-twenty-five-thousandth as tall as Olympus Mons
In other words, 1,200 milimeters is 0.000044 times the height of Olympus Mons, and the height of Olympus Mons is 23,000 times that amount.(a.k.a. Mount Olympus) (Mars)
The tallest mountain in the solar system, Olympus Mons rises to approximately 27,000,000 milimeters. The mountain has been known to astronomers since the nineteenth century because it is tall enough to rise above Mars' frequent dust storms.