Trove is a really really small leather and elastic reversible wallet that is made in England (using Italian leather) at the Mowbray Leather Goods factory. Initially funded via Kickstarter, Trove is now available to buy on their website. TROVE also converts into a phone stand if you like, can be used to hold your headphones, and you can use it on your belt as well as putting it in your pocket or bag. Have a look at the videos and pictures I have posted below to see how it works. The last video also tells you about the Trove secret pocket. Trove also do an RFID protection tracker and anchored insert and a separate cable carry, but the former requires a subscription and the latter is more to carry, so these are less interesting for me, although they may be what you need. Trove wallets are great quality slimline wallets which are very durable and look good – http://www.trove.cc