If you would like to keep attention present, here is a postcard with a golden binder clip and transparent cellophane. The colorful photo in this postcard mockup makes the presentation very appealing to the eye. However, once you attach your superb design to it, the template definitely levels up.
Regardless of the primary intent of creating a postcard design, employ this great mockup and see how it would appear in reality. With no effort, you can have several variations; this mockup allows you to use a different photo, change the colors, or add your specific text.