Specs
In general, we do not care how large or small your artwork is. What is important is that you are aware of the relationship of height to width and that the artwork you submit is at least 300 dpi resolution. You will get the best results if you can supply vectorized art.

For those of you preparing camera-ready artwork, refer to the dimensions below. Everyone else can use this image simply as a rough guideline for the height-to-width relationship.

specs in PDF format