It's about one-eight-hundred-thousandth as long as The Great Wall of China (total).
In other words, 12 yards is 0.000001240 times the length of The Great Wall of China (total), and the length of The Great Wall of China (total) is 806,000 times that amount.(长城, 長城, Chángchéng, a.k.a. 万里长城, 萬里長城, Wànlǐ Chángchéng) (a.k.a. "The long wall of 10,000 Li") (from Shanhaiguan through Lop Nur, China) (total length, all branches)
The Great Wall of China, including all branches and trenches, is 9,680,000 yards. Built and maintained in multiple sections over about eleven centuries, the Great Wall is currently suffering the effects of erosion, especially in the older sections made primarily out of mud.
It's about 0.0000009 times as long as The Diameter of Earth.
In other words, 12 yards is 0.000000860188540 times the length of The Diameter of Earth, and the length of The Diameter of Earth is 1,162,535.80 times that amount.(Equatorial)
The Earth â€” not a perfect sphere, but rather an oblate spheroid with bulged middle â€” has a diameter of approximately 13,950,430 yards at the Equator. The first complete view of Earth's diameter was in a photograph taken from a V-2 rocket launched in 1942 by the United States Army, which reached an altitude of 114,400 yards.
It's about 1,500,000 times as long as a Red Blood Cell.
In other words, the length of a Red Blood Cell is 0.000000670 times 12 yards.(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 2,000,000 times as long as a Nucleus (Cellular).
In other words, 12 yards is 1,800,000 times the length of a Nucleus (Cellular), and the length of a Nucleus (Cellular) is 0.000000560 times that amount.(for animal cell)
The nucleus of an animal cell measures an average of 0.00000660 yards. The nucleus is the largest organelle in these cells, accounting for about 10% of the cell's total volume.
It's about 0.0000003 times as long as The Circumfrence of Earth.
In other words, 12 yards is 0.000000273806520 times the length of The Circumfrence of Earth, and the length of The Circumfrence of Earth is 3,652,214 times that amount.(Equatorial)
The Earth — not a perfect sphere, but rather an oblate spheroid with bulged middle — has an Equatorial circumference of approximately 43,826,568 yards. The first airplane trip around the circumference of the Earth (with a few stops along the way), was completed in 1924 by the United States Army Air Service, and took 175 days.
It's about 5,500,000 times as long as an E. coli Bacterium.
It's about 6,000,000 times as long as a Mitochondrion.
In other words, 12 yards is 5,840,000 times the length of a Mitochondrion, and the length of a Mitochondrion is 0.0000001710 times that amount.(Eukaryotic; average)
A mitochondrion measures between 0.75 and 3 micrometers (Âµm). The mitochondrion is commonly referred to as the powerhouse of the cell, responsible for the generation of ATP. The size, shape, and distribution of mitochondria varies widely, with human liver cells each having 1,000 to 2,000 mitochondria.