It's about as tall as a sheet of Paper
It's about one-and-one-tenth times as long as a Strand of Hair
It's about one-and-one-tenth times as tall as a Human hair, Strand of
It's about one-tenth as long as a Grain of Sand
In other words, 0.00000400 shackles is 0.0878 times the length of a Grain of Sand, and the length of a Grain of Sand is 11.40 times that amount.(medium grain)
Composed mainly of quartz, mica, feldspar, or magnetite, a grain of sand measures an average of 0.00004560 shackles. In 2007, a team of seven in Myrtle Beach created the world's tallest sandcastle, which measured 0.550 shackles in height.
It's about fifteen times as long as a Red Blood Cell
In other words, the length of a Red Blood Cell is 0.067 times 0.00000400 shackles.(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.
It's about one-fifteenth as long as a Strand of Spaghetti (thickness)
In other words, the length of a Strand of Spaghetti (thickness) is 15 times 0.00000400 shackles.(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 0.0000620 shackles 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 eighteen times as long as a Nucleus (Cellular)
In other words, the length of a Nucleus (Cellular) is 0.056 times 0.00000400 shackles.(for animal cell)
The nucleus of an animal cell measures an average of 0.000000220 shackles. The nucleus is the largest organelle in these cells, accounting for about 10% of the cell's total volume.