It's about two-thirds as long as a Grain of Sand
In other words, 0.7940 milimeters is 0.6350 times the length of a Grain of Sand, and the length of a Grain of Sand is 1.570 times that amount.(medium grain)
Composed mainly of quartz, mica, feldspar, or magnetite, a grain of sand measures an average of 1.25 mm. In 2007, a team of seven in Myrtle Beach created the world's tallest sandcastle, which measured 15,100 milimeters in height.
It's about half as wide as a Strand of Spaghetti
In other words, 0.7940 milimeters is 0.470 times the width of a Strand of Spaghetti, and the width of a Strand of Spaghetti is 2.10 times that amount.(average; restaurant and supermarket applications) (based on FMA Omcan Italian Made TR50 Counter Top Pasta Machine Extruder 13317)
An average strand of restaurant-grade spaghetti measures 1.7 mm in thickness. In 2010, a California Buca di Beppo set a world record by preparing a 13,780-lb bowl of spaghetti, served in a swimming pool.
It's about eight times as wide as a Strand of Hair
It's about eight times as tall as a sheet of Paper
It's about one-twentieth as long as an Aspirin
In other words, the length of an Aspirin is 18 times 0.7940 milimeters.(for up & up aspirin, 325mg, regular strength tablets) (a.k.a. acetylsalicylic acid, a.k.a. ASA)
A single aspirin tablet measures 14 mm in diameter. One of the most common medicines in the world and a foundation of worldwide health systems, an estimated 40,000 metric tons of aspirin are consumed each year.
It's about one-sixty-fifth as tall as a Golf Tee
In other words, the height of a Golf Tee is 67 times 0.7940 milimeters.The most common golf tee size and the length preferred for iron and most wood clubs is 54 milimeters tall. The tee did not come into common use until it was promoted by professional golfers Walter Hagen and Joe Kirkwood, as part of a marketing effort by the patent-holder of the well-known, "Reddy Tee."
It's about 100 times as long as a Red Blood Cell
In other words, 0.7940 milimeters is 110 times the length of a Red Blood Cell, and the length of a Red Blood Cell is 0.0091 times that amount.(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.