One of the reasons I am an “Author With Too Many Hobbies” is I also design papercut bookmarks. You can find them in Etsy in my shop, LDWritesAndDesigns.
I create all of the designs myself in Photoshop, and then cut them out with my Cricut Maker. Then, I laminate them. So the negative space in the designs is see-through, but they’re still sturdy enough to use as a bookmark. They’re all available in multiple colors, and I ship globally.