This Desk Hook is inspired by piesupplies' Desk Bag Hook (https://www.thingiverse.com/thing:3521522).

If you want to download this model, please do so on Printables (https://www.printables.com/model/504005-fibonacci-hook), so I can earn Prusameters to get new filament. Thank you!

My Version is based on a Fibonacci Spiral and is completely customizable.
It fits different desk thicknesses and you can customize the maximum desk thickness yourself. However I recommend using the thickness of your desk as the maximum thickness, because this way the position of the hook looks the best.

Since I don't use these hooks for heavy loads I printed mine in PLA with a layer height of 0.2mm. I recommend using at least 3 contour lines for rigidity.
If you want to hang heavier things I suggest using PETG or ABS and a layer height of 0.3mm with at least 3 contours, maybe even more to be safe. However I have not done a strength test so far. If you do, please share your results in the comments.
I also included some regular sized hooks for you as stl files, so you don't necessarily have to customize the model.

Also this was my first attempt on designing something with OpenSCAD to make it customizable for you, so please let me know if you see ways to improve my model.

(Btw yes I know that I could have used partial rotate extrudes, but the Thingiverse customizer, for wich I intentionally designed this, does not support these, as well as other commands, but that's another story)

NOTES FOR CUSTOMIZATION

Edit:
I finally found a way to make the Thingiverse Customizer work, enjoy!

Since the Thingiverse Customizer doesn't like my model, you can customize the hook easily by yourself with the help of OpenSCAD. Yes this sounds terrifying, but rest assured, I have an easy to follow step-by-step guide here for you.

1
If you haven't already done this, download and install OpenSCAD under the following Link
https://openscad.org/downloads.html

2
Open the Fibonacci_Hook.scad file in OpenSCAD.

3
Change the parameters to fit your desk and taste in the OpenSCAD Customizer. You can find the OpenSCAD Customizer on the top right, as shown in the picture in the "How I designed this" section. Press the F5 key on your keyboard to get a preview.
The Parameters are explained below.

4
Before exporting you have to render the hook by pressing the F6 key on your keyboard. When the rendering is finished press the F7 key on your Keyboard to export the model as an STL-file.

5
Happy printing!
I recommend using at least 3 contour lines and a material that fits your needs.

PARAMETERS

DeskThickness
Insert the maximum desk thickness you want to use the hook on. In my opinion the hook's position looks the best, if you set the max. thickness to the thickness of your desk.

Hook Thickness
This is the thickness of your hook. It should not be less than 1/9 of your table's thickness, or else you might get bugs. If you get a hole in the middle try increasing the Hook Thickness, or increase the Chamfer Ratio.

Chamfer Ratio
This is the ratio of the Hook Thickness to the chamfer size. The higher this number is, the smaller is the chamfer. If you get a hole in the middle try increasing the Hook Thickness, or increase the Chamfer Ratio.

$fn
This is the facet number, which controls how detailed curves are modeled. I recommend using at least 500, unless you want the aesthetics of visible geometrical facets, then lower this number by quite a bit. Just try it out, be creative.
However I should mention that the higher this number is, the longer it will take for your model to be rendered, but we are only talking about one minute or so.

Thingiverse Customizer
For whatever reason the preview in the Thingiverse Customizer is tiny. If you know why, please let me know.
If you want to see what you're doing download OpenSCAD and customize the model with the Parameters option on the right

OpenSCAD download
https://openscad.org/downloads.html