Index: _source/plugins/pastefromword/filter/default.js
===================================================================
--- _source/plugins/pastefromword/filter/default.js	(revision 5915)
+++ _source/plugins/pastefromword/filter/default.js	(working copy)
@@ -889,6 +889,10 @@
 						// adapting them to editor's convention.
 						if ( styleText )
 						{
+							//#6241: Some format is lost during paste
+							if ( !CKEDITOR.env.ie && !styleText.toUpperCase().match( 'FONT-SIZE' ) )
+								styleText = 'FONT-SIZE: LARGE; ' + styleText;
+							
 							attrs.style = stylesFilter(
 									[
 										// Drop 'inline-height' style which make lines overlapping.