Signs much larger than that are much, much more effective for spreading the word, needless to say. But they really raise the cost, and they take a lot of time to make if you cut costs by making them.
Then there's the problem of how to print pictures large enough. Well, check this out! It was just sent my way, and I tried it - it works great!
In this sample, I selected 2 pages, portrait, and US letter size. This basically means that my picture will be blown up such that 1/4 of the picture will print per page, which is already large enough that it will be a little blurry. But cars driving past from the distance they will be at, drivers should be able to see it.
Give it a try! Print large pictures for large signs that will be seen, and this should help spread the word!
