Who decides which ‘I Voted’ stickers are at my polling place?

Nicholas Qualls, a voter in Antioch, wants to know more about voting stickers. He asks: What determines what location gets what “I Voted” sticker? My location had a pretty generic oval sticker, but I see several people at other locations get a neater Tennessee-shaped red one. The answer turns out to be fairly simple — but fun facts abound in this short-form episode.