This is a collection of simple geometric cookie cutters, along with the customizer script to generate your own.

I was frustrated by not being able to find simple geometric cookie cutters the size and dimensions I wanted. I wanted small cutters for a 1 YO with the right wall thickness for my slightly temperamental Thing-O-Matic. I took 15 minutes to write the script. I have uploaded a selection of cutters. Please adjust away and make whatever works for you!