SUMMARY
When you open a Microsoft Works Word Processor (*.wps) document in Microsoft Word, and then save the document as a Word (*.doc) document without making any changes to it, the file size increases. For example, a Works Word Processor document containing the sentence
I am testing this document to see how large it is.
is 6 kilobytes (KB) in size as a .wps file, but it is 19 KB in size when opened in Word and saved as a .doc file.
If you then save the document as a Works Word Processor document, it reverts to its original file size.