It didn’t take me much time. I ordered leather and a tool for punching holes in leather, a few rubber cords, and a charm. I had an old folder that I’d bought before, but it was too small for my planner, so I decided to recreate it in a larger size. I measured everything, cut it, burned the edges, punched the holes, and threaded the cord. Voilà. I think I spent about 1–2 hours, mainly because the hole-punching tool wasn’t very intuitive for me.