This a remix of a really nicely designed, albeit really small case for SD Cards. • Print 2, flip, snap together and slip into your wallet. You may need to file or adjust the hinge a bit depending on your printer tolerance. Updated! I realized that the measurements for the card slots were off by 0.3mm. Enjoy! Also, if you'd like a professionally made one for yourself you can order it from my Shapeways store here: http://shpws.me/pjxAPrint 2, flip, snap together and slip into your wallet.