Safety Pin to Badge Back thingy

thingiverse

So I dug around Thingiverse but couldn't find one, probably because my search terms were completely off. This little creation is designed to keep safety pins upright on printed badges, so you won't need to buy actual pin-backs or whatever those things are called. I used 3.3cm long safety pins, but the model should be easily re-sizable without any issues. I've been using hot glue to attach them, and it's worked flawlessly so far, although super glue might also do the trick. I may tweak it later to make the channel deeper and wider to better grip the safety pin's bar if necessary, but that depends on whether or not it becomes a problem. Edit: I've added four new size variations along with a rough sizing chart image, which should give you more flexibility when dealing with different safety pin sizes.