Thanks to Gay, I now have a size chart from a tute that uses the same method as Jenny Doan's for making 4 at a time. Here's the tute (using the same method) that she messaged to me and it has a size chart!
http://sewpreetiquilts.blogspot.com....gles-qsts.html
I like Jenny's because she uses 8 different fabrics that's gives variation!! (and it was the first I saw!) The bias edges will not bother me, I use starch, match up the seams carefully, plus the small size will enable good piecing.
Here is a picture of the cover of the book which shows the Red Hot pattern I'll be doing. All HG's and FG's!
https://www.amazon.com/Scrappy-Quilt...YGX7CT4MBESTBQ
No need of special rulers or tools! Here is a picture of the 4 I made.
There will be 96 of them and about 15 fabrics to make them from, so will be even more variation!
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Thanks so much everybody!!