Answer:
The human haploid DNA, that is the DNA contained in a human gamete, is 3.3 billion base pairs long. So the DNA of a human contains 6.6 billion base pairs. now the distance between two base pairs in a DNA helix is 0.34 nm. therefore the length of the DNA double helix in a single human cell would come to about 2.2 m, approximately. Nature has devised its own ways to package such a long DNA strand in the nucleus of every human cell, which is so tiny when compared to the length of the DNA.
-they are pretty tiny