Re:making own templates using formula at link.
http://www.quiltingboard.com/main-f1/forgotten-way-make-hst-8-time-t230255-post6295113.html#post6295113
Using this method, for 3" finished blocks I need these sizes 3 7/8 square, 3 7/8 by 7 3/4, and 7 3/4 sq..
These are not sizes sold for templates. Any suggestions on a material to use to make my own? Cardboard gradually distorts and some mylars and plastics are too flimsy.