Stick-on pen holders for journals, diaries, and planners

thingiverse

These are pen holders that stick to your journal's inside cover using adhesive tape, making it easy to keep your pens organized. I prefer gaffer's tape because it is extremely sticky yet still peels off cleanly. Since these pen holders don't have a bulky clip like most other designs, they won't interfere with opening or closing your book. By sticking them to the cover opposite your writing hand, you can avoid cluttering up your handwriting space. Plus, since they attach along the edge of the book instead of its face, you can still fit your journal into a slim bag pocket. These holders accommodate pens up to 12 mm in diameter, giving you plenty of room for your favorite writing utensils.