List the following based on their relative size starting with the smallest, Oscillatoria, Gloecapsa, bacteria, Elodea cell, onion cell, potato cell, cheek cell, Amoeba, Paramecium?

The first three are bacteria, cyanobacteria for the first two.

I can not remember all the sizes exactly but wiki usually has sizes by microns for anything this small.

Elodea cell, onion cell, potato cell, cheek cell, Amoeba, Paramecium?

You know these are rather large compared to the first three, but exact sizes are listed on line.