Actually they were supposed to be 8 1/2", but no matter what I did they came up short, so I'm having to make the blocks to 8" finished to 7 1/2.
I looked the world over for an 8" ruler and all I could find is an 8 1/2". I'll try using that one, but I'm not sure I quite understand. I'll look @ those videos, too.
I've tried cutting 1/4" off each side and it was too small. Tks for all your responses. Really appreciate it.