There is a small pocket to keep stamps in and I plan to use another for address labels. The mini notebook I made contains all the holidays and events I need to make cards for broken down by month.
I think I'm going to make a small address book to go in here as well for those I most often send cards to.
Here is the original site that the idea came from. All the dimensions are listed, as well as a very helpful video!
Thanks for looking!!