You can change the font type and size at Windows SQLPLUS GUI. Run "regedit" to open the Registry Editor. Go to HKEY_LOCAL_MACHINE->SOFTWARE->ORACLE->HOME0 and create two new "strings"
SQLPLUS_FONT and SQLPLUS_FONT_SIZE. For example
SQLPLUS_FONT=Courier New SQLPLUS_FONT_SIZE=14
Now you will have much more small fonts in SQL*PLUS!
