Thank you so much for the help. I will try that. I was watching the quilt show, Quilt in a Day about the Dresden Plate. Eleanor Burns was showing how to make a 12 inch block and an 18 inch block. She said to make the 12 inch block, you cut fabric 4 1/4 x 9 inches, then cut your wedges. She used her plastic dresden ruler. I think she got 4 across. The only thing she said about the 18 inch block is that you cut the fabric 6 inches x ?.
She didn't mention the width. Would it still be 9 inches ? I wonder if the wedges for the 18" block are the same size as the 12 inch block, just longer but not wider. I hope I made sense. What would the top width and the bottom width be of the wedge?
Thanks again for your help.