We fly Alden Glory all the time from our ship to the shore antenna. I bought one at Dollar Tree in July. I reinforced all the edges with my
sewing machine, folded one side and made a seam so that we could put
it on the antenna. I bought and sewed a few, because it's quite
a thin fabric. We are still using the original one.
If you need a sports team flag, you can take one of the flags that
is on a plastic thing that you attach to the top of the door and
frame of your car. This is a flag of the desired size.