Each of these images is available as a boxed set of 25 5x7" folded cards. You can customize the text on the inside of the cards or leave it blank. All the cards in a box carry the same image.
Click on the desired image. On the page that opens, click Buy. Then click 'select'. Don't worry if the wrong image is displayed at this point, just click on it. Now you can edit what is on the inside of the notecard, or leave it blank, as you wish.