If you want to create your own artwork, here are the requirements.
Art needs to be "print-ready" (made to scale in proper shapes)
There will be two files for each card. A 6' tall x 6' wide square (logo side) and a 6' tall by 8' wide rectangle. (image/greeting side)
These should be submitted as two individual files as each one is a separate banner.
Files need to be made at 150 DPI (images taken off the internet are 72 dpi and WILL NOT WORK)
In Photoshop, at 150 DPI, the image dimensions are:
6x6: 150 DPI, 10,800 pixels wide by 10,800 pixels tall
6x8: 150 DPI, 14,400 pixels wide by 10,800 pixels tall
Once you are happy with your image, be sure and flatten all layers (this will convert your font to an image) and decrease the file size. Export as a PDF.
The files will be massive. Too big to email. (50 to 150 MB). You may need to deliver on a thumb drive, or I prefer emailing them using WeTransfer.com
You do not have to use Photoshop, as this can also be done in Canva and other programs. Main points are that the images are in the right SHAPE, the right DPI (150) and the correct SIZE.
Below are PSD and JPG templates that you can download and build on top of.
Photoshop Templates:
JPEG Templates
(you can see how big these really are)