I made a couple of these several months ago. Inspiration was a co-worker who said her husband uses a binder clip to hold his credit cards and cash. He’s test-driving one, the one pictured is mine. The PDF is a rough guide. Red lines are fold lines. I used a groover to go over the fold lines and a couple of parallel lines next to them. My stitching line isn’t parallel to the edge, which makes me unhappy so I mostly don’t look at it.
Album link: https://imgur.com/a/HHiZOeK
PDF: Minimal L-fold.pdf (152.8 KB)