needed a special size of cookie cutter, so created a customizable version. I "sharpened" the edges to make it a "cutter"

see also my other cookie cutters: Star https://www.thingiverse.com/thing:1959578 Flower https://www.thingiverse.com/thing:1887302 Christmas tree https://www.thingiverse.com/thing:2714875 Tetris https://www.thingiverse.com/thing:4653117 Heart https://www.thingiverse.com/thing:4744013

As requested: How are the sharp edges created? OpenSCAD allows to create "cylinders" with different diameters at top and bottom. Actually this creates a truncated cone. Using a truncated cone and cut out a cylinder in size of the flat part creates the sharp edge.