One of our members, Mary Anne came up with this way to display her cards. I think it is really a nice way to show off your tiny works of art.
She sewed tiny doll clothes pins to the fabric, then she slips the cards on the pins. I am not sure if the fabric is quilted but you can buy quilted fabric and just bind it and then sew your pins on. If you have a Dremel drill or a regular drill with a tiny bit I would think you could do a hole in the pin to make it easier to attach. I need to look in to this and see what can be done.
Great job Mary Anne.