Here is a screenshot of what they look like:
Here’s a full-size sample of one of the Graphics for Facebook. It is watermarked below, but the ones you purchase have NO WATERMARKS ON them.
To make them unique to you, all you need to do is add your unique website URL or facebook page at the bottom of each image. This can easily be done in any free image editor, or you can use a watermarking website. Here is a brief video I created that shows you how.