My apartment is 10'x20', and the walls are made of white painted cinder block. Not exactly the most comfortable surroundings, but I made a poster to cover my one wall, roughly 7x12'.

The problem I have is with the facing wall. It runs the length of the apartment, and the poster I would like to make to cover that wall would be roughly 16 feet long, and 3-4 feet high. Obviously those rough dimensions will be hard to find, but I was hoping that one of you guys might be able to help me out.

For those wondering, the poster is simply made out of printer paper. I used the Rasterbator to upload a picture, size it to the space I want to cover, and it sent it to me as a PDF file.
Any pictures provided would be greatly appareciated.
