Just a simple bookmark 3 layers (of 0.2mm) thick with fantasy strings. Easy fast print. The central line is added for strength.

The extra bulge (can be folded over with V1 and is present in fixed form in V2) is to prevent the bookmark from disappearing between the pages.

Combine different colors for a cheerful effect. Scale in X and Y to create the ideal size for you. Printed with nozzle 0.4 and layer heigth 0.2mm. Don't use support.

p.s. scaling in Z (thickness) is not recommended, but is possible. Due to the overhang, however, the round lanes can become straighter, which looks less attractive.

tip: if you have to change color manually, set the skirt to at least 3. This way you will lose that first "stuttering" of printing and any leftovers will be dumped on the skirt.