I think you should tell people how large the panel is or how larger you want it to be, then they can give you the exact size for the blocks. I have done a whole quilt of deer blocks, with the attic window effect, with a header and footer on the quilt of 'deer scenery'. These people are good in math and working with EQ8, I bet they can tell you the 'how' of it that way, so you have your pattern. Just a suggestion.