...the soul is described as being 1/ 10,000 th the size of the tip of a human hair,spiritual things also have dimensions,the are not formeless or invisible always.
"In the previous verse we have discussed, ye yatha mam prapadyante tams tathaiva bhajamy aham. Krsna is the Supreme Father. He’s very loving father. So He has given freedom to His sons. We are, all sons. Mamaivamso jiva-bhutah. Aham bija-pradah pita. Krsna says, “I am the bija-pradah pita. Material nature is the mother.” Tasam yonir mahad brahma aham bija-pradah pita. So the original father is Krsna, and mother is this material nature. So I am the soul, spirit soul, very minute position. My, my magnitude is very, very small. That is also given in the sastra: kesagra-sata-bhagasya satadha kalpitasya. One ten-thousandth part of the tip of the hair. That is my magnitude."
Can we see consciousness? If we see this gross material body without subtle nature, then we are on (no better than animal societies) platform of life, of eating, sleeping, mating, and some defense. I agree with Mishra, the description of molecular size is given but can not be measured -- just perceived imho.