This evening my six year old asked me
"Would a piece of paper look as big as this room to an atom?, or bigger?" ('this room' being a small sized bedroom)
A friend suggested it would probably look as big as the state of Connecticut. Then I figured well really the question is not defined enough, because really a piece of paper would look as big as a piece of paper.
Let us instead ask
"If you blew up an atom to the size of a human, and you expanded a piece of 8.5" x 11" paper by the same amount, how big would the piece of paper be?
I found someone's estimate of the number of molecules in a piece of paper:
$$2,247 \times 10^{23} \text{molecules}/\text{sheet of paper}$$
I guess all I need do now is multiply an 8.5" x 11" sheet of paper by that number. Only think is I don't have a clue how to work with that number!