Answer :

We can arrange the following entities from sizes smallest to largest in:
1.                                
Carbon atom. Consider the carbon atom in the periodic table which evidently small in size. Like any other atom such as hydrogen and oxygen.

2.                                
Monomer. Is a singular molecule that can combine itself with elongated chains and other molecules. And thus form,

3.                                 Polymer. Polymers are made from a complex amalgamation of monomers.
4.                                 Macromolecule. And thus the macromolecules from the word macro are the biggest component. Which forms the lipid, proteins, RNA enzymes in the cell.