Summary

Danny Phantom! I included the 3mf for multicolor, or you can import the .STLs yourself. I used these round 3x1mm magnets, but really any you can glue onto the back of them. https://a.co/d/5ddhSyl

The STLs are all to scale with each other, but will need to be resized for your print.
For the size I arbitrarily chose these measurements.
X: 69.45 mm
Y: 110 mm
Z: 1.50 mm
dannyPH.stl (Bottom) I made .7 mm for Z so it was thinner, and then dropped the layer so it was on the bottom.

Here are the colors I used from Top to Bottom:

dannyPH-4.stl - Green
dannyPH-5.stl - Beige
dannyPH-6.stl - Brown
dannyPH-7.stl - Gray
dannyPH-3.stl - White
dannyPH-2.stl - Black
dannyPH - Black

Double check the print preview. Some designs I have to paint on a layer of color. Let me know if you have questions. I'm still new to Multi-color and making my own models!