This is a picture of the first one I made. I absolutely LOVE the fabric that I found at Hobby Lobby for this project. The notebook is a standard 3x5 spiral notebook and we found the pencils at Target. They are mechanical pencils but were only 5 inches long (the PERFECT size for this project).
In case you want to make some of your own, you can use the instructions here. The only changes I made were to cut the pieces different sizes. The outside and inside covers are 12.75" x 4.5". The pocket piece is 10" x 4.5" and I sewed the seam 1" from the right to hold the pencil. I may try making the next ones 1/2 inch shorter, though. I seem to have quite a bit of "wiggle room" even after adding the notebook. I also would like to find some bigger buttons in bright colors. I'll let you know how that goes. I just have 29 more to make... Yeah, that should keep me busy through the summer.