Here is a project that's made it's way around blog land many times over.
It's quick, it's simple, and it's customizable.
For your picture you can use an enlarged copy or an enlarged photograph.
The method is slightly different depending on what you choose.
I chose to use an enlarged copy on regular printer paper and do a reverse transfer.
I will start by telling you; I chose to just do a print off at home & tape four pieces of paper together.
If you're going for a more 'polished' look, you may want to take your picture to a copy place and have them enlarge it for you to avoid any lines or creases.