Template maker offers templates for more than 30 different shapes that can be used to package or display items, to decorate, or even to play (see the Soma Cube). You can customize the size of every template, and sometimes more (the number of branches on the star-shaped templates, for example).
The templates are copyrighted, but permission is hereby granted to print and even mass-produce the templates, also commercially, as long as they are used for packaging or educational purposes.