The file 'Pi Keychain / Backpack Charm 3D Printer Model' is (stl) file type, size is 7.2KB.
I made this pi keychain (or backpack charm) for my somewhat geeky son so he could attach it to his backpack for school.
I started out with Garamond bold, then rounded the upper right-hand corner, and punched out a hole. I eyeballed it all, but it turned out to be just about the same size as the Turtle Keychain by Roland ( http://www.thingiverse.com/thing:23823 ), which I printed at the same time for my equally-geeky-but-in-a-totally-different-way girl.
PiKeychain.stl | 83.6KB |