My favourite wallet design to use myself. The wallet has two card slots, each with a turned edge for longevity. Each card slot will hold around four stacked cards, and some folded notes behind. Once folded and in a pocket, nothing can fall out and you will barely notice you're carrying it. 
Fully hand stitched, entirely made with aniline milled kangaroo leather from Queensland, it's made to last a lifetime. 
 
If you're still reading, here's some nerdy stuff about the design. The lining and the exterior are not fully glued to each other, the lining is 'floating' and glued and stitched around the perimeter only. This makes the wallet softer and easier to fold up. I also made the lining shorter than the exterior so that it doesn't bunch up on the inside when folded. You'll also notice the lining is skived off around the edge to a zero edge to reduce edge thickness in the card slot areas. It's little things like that you won't find on any factory made items.