What Is a Flag?
According to the National Flag Code, the flag of the United States is any flag of the United States, or any part thereof, made of any substance, of any size, accurate or not, that is recognized as a flag by the reasonable observer.
(What other flags of the US are there? There is, or was, an American Civil Flag. It had vertical stripes.)
The flag should never be used for advertising purposes in any manner whatsoever.
Advertising signs should not be fastened to a staff or halyard from which the flag is flown.
No part of the flag should ever be used as a costume or athletic uniform.
The flag should never be used as wearing apparel, bedding, or drapery.
The flag should not be embroidered on such articles as cushions or handkerchiefs and the like, printed or otherwise impressed on paper napkins or boxes or anything that is designed for temporary use and discard.
The flag represents a living country and is itself considered a living thing.