Small oval slab cutters
thingiverse
These two ovals are about the right size for cutting out a 2mm to 4mm thick slab for making labels, such as name personalization, to be stuck to larger pottery. Particularly, they use a cutting edge that is 0.35mm, which I found to be the minimum that the Crealty Ender 3 would actually print. This makes for a fairly sharp cutting edge.
Download Model from thingiverse
With this file you will be able to print Small oval slab cutters with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Small oval slab cutters.