Banner for Parade?

Hey, I’m about to start looking at getting a banner made up for parades, etc…

Is there anything I need to know before I start…like is there a preferred measurement, where to go (printing shops?), that sort of thing?

Here are some pics of our banner. It was made before I joined the club so I don’t know who made it or how.

http://www.uniquesunicycleclub.org/albums/photo?photo_id=8489

http://www.uniquesunicycleclub.org/albums/photo?photo_id=5489

http://www.uniquesunicycleclub.org/albums/photo?photo_id=3528