An elegant, robust and reusable notebook with a pen compartment.
Once you run out of blank pages you can just switch the paper out and keep the used ones stored with another rubber band.
depending on your paper weight up to about 20 papers do fine – that will then be 80 pages.
The pen compartment is 10 mm in diameter, but it fits larger pens, too. Since the covers hold the pen in place, you can even use ones with a clip!

Versions included
For DIN A4 Paper – DIN A5 folded in Size
For US Letter sized paper

What you need
The printed parts
Two rubber bands – regular household ones
Regular copy paper

Instructions:
Choose your version
Choose your clip: The clip should fit into the cover with a little friction. Go for the clip_default first. If it is too tight use clip_more_clearance. If it is too loose use clip_bigger.
Print two of the covers, the back and four clips
Fold the paper in half (Tip: by folding them one by one the result will be slower but more precise in alignment).
Assembly the notebook by inserting the clips and pushing them into the cut outs according to the images provided.
Bind the pages with the rubber band
Insert the other rubber at the open end of the back cover. This band has two positions. When the book is open you insert it in the sideways facing indentation in the back cover. When it is closed the band goes over the front cover.
Enjoy!