[Callers] Text size problem

Two persons have lamented privately to me that my posts are reaching the group with almost unreadably small text.No where else I send email or post has reported this problem Which, if any  of these lines better? 1. Garamond small 2.  Garamond medium3. Garamond large 4 Modern small5 Modern Medium6 Modern wide Michael Fuerst      802 N Broadway      Urbana IL 61801      217 239 5844