Dear Amol
did you check: http://help.sap.com/saphelp_470/helpdata/en/a7/2876030a6c11d28a220000e829fbbd/content.htm
and similar links? There are a lot of hints regarding the "Sizing" topic.
As you are mixing languages: as discussed with you in a different thread here we have the "issue" of finding the "suitable" font to be used. May be this can be a problem if you mix west european with other languages so that text sizinig does not work properly.
Check may be OSS Note: 845617, 939928
C.B.