Redge wallets have an incredible solution for you. You can fit 12 cards with cash on the back using a clip like this one, or a strap. Ridge are so confident in the quality of their product they will give you forty five days to test rive their wallets. That means you can get the wallet, use it, and if you don't like it, you can return it within forty five days. Because ridge is such great guys, ere going to give you ten % of and free wo wide shipping and returns.