This is the best and minimalistic design, I could find out there. Resized the original, so you can easily put many of them next to each other in a row. Actually made these ones for my grandma, who always makes a mess with her keys!
Use this for making your own set of colorful keyholders, with name tags!
Hints:
In Slicer, make sure, the text is same level like the surface and print with text facing the bottom.
Magnets used: 3x10 e.g.: https://www.amazon.de/dp/B0CH3BKNJK
But feel free to use other sizes by modifying the negative cylinder model of the middlepart.