Thank you for viewing. This is a Comet stamp album. It's the type where you attach stamps using hinges. I purchased it with 50 sheets, but I used some, so there are 22 sheets available. Sheet dimensions: 17.7 x 25.6 cm Album dimensions: 20.8 x 27.1 x 3 cm Hinges are also included (see photo 1). There are over 400 hinges. You can also purchase hinges only, so please inquire in the comments if you are interested.