This model is a small holder to glue onto the cover of your notebook to hold a pen.
3 sizes are available, 8, 9.5 and 11 mm depending on the diameter of your pen. Chose a diameter slightly smaller than the pen.
You can also chose between blank models or model marked by the letters: ♥ 3D
Letters are much more visible with more intense filament colors.

It should be printed without support with 0.4mm wide layers so that the walls are 2 layers thick.

I also included a customizable file made with OpenSCAD, for detailed explanations on how to use a customizable part look here: https://www.instructables.com/Learn-How-to-Use-Customizable-3D-Models-With-OpenS/

As the initial design the part is intended to be glued with double sided tape on the back cover of your notebook to hold a pen.
You can freely chose the diameter of the clip to fit your pen and the text on the feet.
The model parameters are:
Height=20; the height of the clip
Feet_size=30; The dimension of the flat part of the piece intended to be stuck on your notebook
Diameter=8; the inner diameter of the clip. Should be about 0.5 mm less than you pen diameter
Text="3D"; The text you want to appear on the flat part of the clip

!!! Customizer does not accept special characters but you can add some like ♥ by downloading OpenSCAD and making the modification locally on your computer.

Text_Size=6; The size of the text in mm

The text should be short (a few letters) to fit inside the object.