How to create stencil

I wonder is there a way to create stencil ro 3d print, about 1mm thickness??? please help

I wish also to know how to create such cutters as the photo on cookiecad???
topSmall (5)

You can make stencils by lowering the blade depth and handle height to your desired thickness.

For your second question, are you looking to create joined cutters, or that shape?