It's an abstract work that has to do with space and the hand of God.
The dimensions are 31" x 13". You can print it smaller or larger if you'd like, but if you print it larger, it will be at the expense of the printable's resolution.
You'll get two PDFs and two JPEGs--the "two" meaning both CMYK and RGB for each file type. So you'll get CMYK and RGB JPEGs and PDFs too! (If you're new to all the technical speak, don't worry. All you really need is the JPEG to have an image. If you want the image to be used on the web, use the RGB version. If you want it to be printed, use the CMYK version.)