I've had this set of Yoshimoto Nara postcard from his exhibition for ages. It took place in Sydney and back then I couldn't have bought something larger to hang on my wall. I loved and still love his art and I had to have something more than a postcard on my wall..
So that's where my postcard poster came from.
I used a large black picture frame, black paper as a background and a white pen to write the names below each postcard. I used those tiny thick double sided stickers to attach the cards (no idea what those are called) but it made it look much better than if they were simply glued on flat.