Download our templates, and create your artwork in a professional graphics program, using high quality 300 ppi images. Be sure to use CMYK. We will convert any RGB images to CMYK for printing, which will result in color shifts. (be sure to see this artcicle about the difference between RGB and CMYK here)
It is better that you see this change on your own computer.
Finished design files must be submitted in PDF format. When exporting your final design for submission, we recommend exporting your PDFs using the PDF/X-4 preset available in every layout application.