Some questions. Height of banner? Do you want it animated or not? And plus its a Photoshop job not Illustrator.

Height of banner I leave to the judgement of the designer.  Because the banner needs to include an graphic for each of 26 different U.S. States, and some U.S. States have a greater vertical size (like California), I would ask the designer to choose a banner height that works best across all of the possible U.S. States.

No animation with the banner.