Looking to affix medals in a display case I previously had medals in a display case. They were originally affixed in a very rudimentary way (I just stuck push pins through the back, which was a thin cardboardish material). 

I'm putting some green felt down in the display case and figured that I'd like to affix the medals in a better manner, but I'm not sure what this better manner would be. With the push pins, the medals would often slide off if the case was jostled in any way. I'd like to avoid that and affix them in a more stable manner. Any suggestions would be very appreciated!



Original push pin solution above



How the medals hung above
A very simple solution is to use small nails. Your medals slide off the pins because their needles taper off at the end, creating a tiny slope for the medal to slide down.

If you use nails instead (heads facing the front), the heads form a tiny barrier that keeps the medal in place. There's a surprisingly wide variety of nails available. For this purpose you should choose ones with a distinct, but not too broad head and - if available - black nails. 

You might have to add a thin wooden board to the backside of your showcase to give the nails enough material to dig into. If you want to paint the nails in the same color as the felt, do so after hammering them in.