sew4nin I mail my stuff the same way Barb does. It really does work. I use any type of thin cardboard, I have been know to recycle cereal boxes. When I wrap mine in plasitc wrap I will poke a few small holes in the plastic so air can escape so when you take to post office it fits through their little envelope thing. Barb and I swap charms on another site and our envelopes have 100 charms in them so this should be not problem for 50 charms.