Look at the new rulers that Sparrow quilting is showing. I might try those as they look like they do a good job.

Went to the June Tailor site to look at the ruler referenced above, and found out that I have one already. Lol, didn't know the name. Started watching videos. Saw the one about the Charming Circles Ruler. $15.49, yowza. Looked for things that are 7" in diameter at Home Dept, and bought a Stainless Steel Repair Flange for $5.50. It'll last a lifetime, and I can put any kind of handle on it I want. For the 5" squares in the middle, I can use the shape cut or whatever. To center the motif in the middle of the charm, I can use a 5" square of cardboard with a hole in the middle, among other things. Hehe, it's a steampunk quilting ruler.

Thanks for mentioning Sparrow Auilting rulers. I watched their videos on their long rulers for the sewing machine & their 6" square ruler. I would really love to have these!