If you go to, I believe, Preferences > Tools, there should be an option for set Bounding Box to Use - either Geometric Bounding Box or Visual Bounding Box. What is selected here for you?
If itās Visual Bounding Box (default, I believe) it will display the object size including the stroke. If you select Geometric Bounding Box, it will actually use the path for the size, not the stroke.
Youāll find that your tabs etc will probably fit better also 