I felt like something was missing from my Valentine Pin/Pendant - http://www.thingiverse.com/thing:410984 - so I designed a little frame for the pin form that created a more finished look and maybe some additional protection for the gears. Using the pin from before now allows for either a pin or pendant frame to add some finish and strength. While there was a lot of tolerance for printing "flash" (excess material) around the gears in the pin design, the frame isn't as forgiving. But, it's close enough that almost no cleaning is required!
The pin with frame measures 5-1/5 cm wide by 6 cm high.
I used 0.3 mm layers, with 3 shells and 20% fill for the frames in the photos.