I actually made 2 wallets but the first one was really ... overboard. I broke my walking foot on it. It's fixable, but also regularly rebreakable.
Both wallets are made on the Slimline Wallet pattern. Six card slots aren't enough for me, so I added a second unit to the design.
Wallet #1 had the increased bulk of RFID-blocking fabric in the card panels. For the record, I don't think I needed that technology in my fabric but I bought it on impulse and thought I should use it before I forgot was it was. It also had leather from my old couch as its exterior and that added even more bulk. I had trouble getting the stitches to behave and I don't think my machine (a good Janome 8900) would like to do the top-stitching to finish that wallet off.
Super cute Riley Blake fabrics, though, right?
So then I cut the fabric for wallet #2 and didn't use linen on the outside, but instead pieced a 9-patch of 2 kinds of stripes. On the inside, I have three colours of reverse dots.
This is the extra card slot unit:
It's a pretty quick pattern, especially the second time you make it.