I'm a little late jumping into this thread, but here's what worked for me. I got a faux leather bag at a camera store. It was supposed to hold a rather large telephoto lens for a medium format camera. It has a draw string cord and measures 4 in. in diameter and is 9 in. long. I filled it with pennies and it works great. The leatherette does not scratch a print. Anything smaller may not hold your prints firmly enough.