Originally designed for my wife, but adapted so we both can focus where we want to.

Simple cut out. I liked this for the organization aspect and the flexibility to DIY repeatable, but flexible, notebook pages. If you are anything like me, I am always adapting my style of note-taking, or lists. I may focus on one thing for a few weeks then change it a little. This template is broad enough that you can spend your time crafting your “project” and not messing around with counting spaces and measuring to draw lines. Printed books always failed for me because I would quit doing the task once I got what I was looking for out of it. (And no that doesn't mean I went back to my old ways… I feel the thoughts of judgment!!! I keed I keed…)

Used for this notebook on Amazon - PAPERAGE Dotted Journal Notebook, (Burgundy), 160 Pages, Medium 5.7 inches x 8 inches - 100 GSM Thick Paper, Hardcover.

I also tested it on my 3D design book (for size comparison). It works but I would adapt for less hassle long term (trim in print or manual). A small section on the bottom box overhangs the edge. Not a show-stopper. Amazon - Moleskine Classic Notebook, Hard Cover, Large (5" x 8.25") Dotted, Sapphire Blue, 240 Pages

Design Sheet: 192mm x 137mm x 0.75mm
Book Dimensions: 5.7" x 8"

Trimmed down to fit into the back as an “extra sheet” when you need it rather than a bookmark, but it should work as both. I chose to not cut down more to fit into the back pocket. Personal preference.

As a side note, since this is PLA, and very thin, you can always print out several and cut them down manually if the model just needs to be tweaked. Be sure to use the proper personal protective gear (ppe) if you choose that path!