Minimalist two-slot wallet: one sized for credit cards, one for business cards.  If you hadn't noticed, business and credit cards are slightly different sizes (86x54mm for credit cards, 89x51mm for business cards), which makes it a bit of a challenge to have a wallet that will securely hold both of them. We designed this wallet with a horizontal pocket for credit cards (and stitching on both sides and open on the side with an envelope cutaway for access), and a vertical pocket for business cards (with stitches only on the bottom and open on the top with an oval thumb slot for access). The 'alternate pockets' provide a slightly deeper space for the business cards to remain covered in the pocket and keep the corners from getting dinged.