It's about 950,000 times as long as a Strand of Hair.
It's about 950,000 times as tall as a Human hair, Strand of.
It's about 1,000,000 times as tall as a sheet of Paper.
It's about 0.0000003 times as long as The Distance from Earth to the Moon.
In other words, 210 cubits is 0.00000024974740 times the length of The Distance from Earth to the Moon, and the length of The Distance from Earth to the Moon is 4,004,046 times that amount.(a.k.a. Luna) (median of semi-major axis, or apigee, and semi-minor axes, or perigee)
The orbit of the Moon around the Earth is elliptical, with an average distance of 840,849,700 cubits from center-to-center. About 428.376 kg of moon rock have been cataloged on the Earth, from the American Apollo and Soviet Luna Programs, and from samples that have been extracted from meteorites.
It's about 15,000,000 times as long as a Red Blood Cell.
In other words, the length of a Red Blood Cell is 0.0000000770 times 210 cubits.(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 15,000,000 times as long as a Nucleus (Cellular).
In other words, the length of a Nucleus (Cellular) is 0.0000000630 times 210 cubits.(for animal cell)
The nucleus of an animal cell measures an average of 0.0000130 cubits. The nucleus is the largest organelle in these cells, accounting for about 10% of the cell's total volume.
It's about 50,000,000 times as long as an E. coli Bacterium.