Hi Anne, I have a really dumb question. What do you mean by a bias edge?
Back to the cutting, I took your suggestion and cut the #13 template into a 2” square. Same with #20 template: I cut it into a 2 ½ inch square.
I think I see my problem. My inside squares (13 of them) measure 1 ½ inches square when finished. I guess this would make sense if I started with 2” squares. But when I measured the plastic template that I had cut out (back from when I didn’t realize there were rotary cutting directions), it’s 1 ¼ inches square. So I guess that’s how I wound up with a finished 6 ½ inch block with no room on the edges for the seam (without sewing over the points). All my squares are 1/4 inch too big.
Thank you! Debbie