Just to update, I have tried many things so far and this time I tried creating a circle at 4.5" in Inkscape and saving it as a .pdf file. I opened it in Acrobat and printed it but it still comes out 1/16" too small. So, with that said, I give up. If anybody can come up with a suggestion beyond what has already been tried, I'm open for most anything. Thanks again to all.