A picoplastic is also known as a carbohydrate, ketone, or whatever basic organic molecular building block. "the typical length of a carbon–carbon single bond is

A picoplastic is also known as a carbohydrate, ketone, or whatever basic organic molecular building block. "the typical length of a carbon–carbon single bond is 154 pm" according to wikipedia, so typical plastics are necessarily at the nano-scale or larger, as a plastic is defined as a polymer of organic molecules, I believe.