3×5 cards for on-camera “bounce”. We bend the card over and around the on-camera flash, and affix it with a bit of sticky tack. This helps give a “glowing” look to photos. With my little Canon, you can see how I lined the camera up to the corner of the card, cut where the red lines are and then bent where the black lines are to create this “bounce” card. I attached the card to the camera with sticky tack, then slightly bent the card to “frame” the camera’s flash better.