I found a ruler as I was on You Tube called Omni Arc, I was wondering if anyone has used it. It looks like I would get 8" finished squares which would be good. My thought is after I used that ruler and before I unfolded the square of fabric I would use my rotary cutter with the pinking blade and cut the edges then and once the material was unfolded I would have the circle already pinked. Using actual pinking shears it rough on mom's hands and mine as well, she has arthritis and I have carpal tunnel. If I go with the Omni Arc ruler I can have it from Amazon on Monday and then I would just have to mail her the finished items which wouldn't be a problem. I just wish I new what size strips the fabric had to be cut to so I could have some of the prep work done ahead of time.