First & foremost, each any every issue of The E-Sylum is a real gift to all of our members. Thank you!

I have a question: Some older references (i.e Betts & Baker) use a numbering system to state the size of a medal (such as size 22). Is there a standard chart for conversion, to millimeters, for each size number? My own conversion chart, created just from medals I have researched, is surely not totally accurate and has gaps. Again, thanks.