A standard comic book is 6.625- x 10.25 inches. And you need the frame to be a little bit smaller than the comic book in order for the page to fit properly. Keep in mind that the size of the frame is actually measuring the opening in the center, not the actual frame itself. So, a 5- x 7-inch frame will fit a 5- x 7-inch photo. Then, you have to take into account the size of the actual frame around the image. We used a 4- x 6-inch sized unfinished wood frame for this project and that gave us enough space around the edges to see the comic books. You could also be fine with a 5- x 7-inch frame too. Or, look for square frames with a smaller cut out for the photo but a larger border. Those would work as well.