Collar

Source: https://github.com/obzerving/Collarz

The Collar extension can be used by papercrafters to design a truncated regular polygon.  The user inputs the number of sides for the overall polygon shape, the width of the "collar" at the top and at the bottom, and also the height of the collar.

The output of the program provides the side, top and bottom pieces—with gluing tabs where needed—as well as untabbed pieces that are used for cutting the decorative/wrapper paper to cover the outside of the object

More details: https://github.com/obzerving/Collarz/blob/main/How_to_use_collarz.pdf