I think that there really isn't a pattern, as you would have different rulers then someone else. Here are some places to look:
https://duckduckgo.com/?q=quilting+r...ages&ia=images
Hanging quilt ruler holder
hanging ruler holder
https://www.quiltingboard.com/attach...ent-154309.jpe
Janey - Neat people never make the exciting discoveries I do.
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