Thanks. Yes, I'm aware of how to change the size of buttons.
The problem was opening an existing Access 2013 application with a new laptop all the buttons visually were 10-15% larger than their actual size and overlapped each other,etc. This happened as well when I created a whole new form... buttons overextended their defined boundaries (as in the provided image).
I think I finally found the culprit?? Modified the size of "Items" in the Display parameters from the Control Panel and everything looks ok again.
Still seems weird!