Star
thingiverse
Just your run of the mill star, but with a flat side so you can glue on a pin or a magnet. You may need to scale it to fit your needs. Enjoy!
Download Model from thingiverse
With this file you will be able to print Star with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Star.