These are simple bookmarks to put inside your books. these work really well for me.
they have an indent on the top to write stuff in ( or put paper / sticky labels inside (10l x 18w x 1h ))
i printed mine ( the ones in the photos ) in white PLA+ from creality on a modded ender 3 pro 1 with custom firmware, but basically all FDM printers should be able to print these well.
i printed mine without a raft, and used a skirt.
Settings:
Hotend temp : 205c
Hotbed temp : 63c
Infill density : 10%
Infill pattern : Gyroid ( on cura )
Print speed : 100mm/s
i provided my GCODE files for the ender 3 so this should work on your ender 3 if you have one.
both took around 40m to print in one file
The author marked this model as their own original creation.