These are for the 4X6 photo albums that you find at Walmart or dollar stores. Graphics are saved big enough so you can use bigger books as well. You get instructions for printing sizes in the zip file.
They make great gifts and are so easy to put together. They make a nice activity for bridal or baby showers. Just hand each guest a card, have them fill it out with a bit of advice, put the book together and give to the guest of honor. The graduation ones would be great at a graduation party doing the same thing.