Thanks to both of you for the responses. Much appreciated.

Paul, Test-2007 & Test-365 are the same template. It was created in Word 2007 and is now being used in 365. When I select that entire HTML and paste it into 2007, then do the same in 365, the results are in those attachments I included. And as you can see, they are not the same for whatever reason. The fonts you noted change automatically after the paste is completed. 2007 seems to automatically "fit" the page into my text box. 365 does not.

Andrew, regarding the browser, I have always used Chrome for this process and did so in both of these test cases. However, in an attempt to diagnose the issue, I also tried using IE and Edge and the same problem occurred.

Hopefully I am making sense. It's tough to explain. If you have any suggestions, please let me know. Thanks again.