I remixed my Teddy Bear from Capsule to make a cute magnet. I used Tinkercad to cut off the back and add a hole to fit a 20 mm (2 mm thick) circular magnet. (Round Magnets with Adhesive on Amazon).

The bear is 40 mm tall and fits the above magnet perfectly when printed at 100% scale. I printed it standing up without supports.

Note that this is a remix of my remix of Teddy Bear Capsule (Screw-On Lid). I used "Merge all outlines into a single solid model" within Simplify3D when I set this up to print since it still has the internal hole and threads from the original capsule.

More of my models on Cults:
https://cults3d.com/en/users/abbymath