I'd agree with Rich and go for the banner sticker.
There are the details for it that you've probably already read:
Tell the world how you feel! Our bumper stickers are perfect for expressing yourself while cruising down the highway or just for posting on the wall. Made of durable vinyl and measuring a generous 10" x 3" these stickers are made for adding style to any surface.
Printed on 4mil vinyl using water and UV resistant inks - means no fading in the sun or bleeding in the rain.