A family of Microsoft word processing software products for creating web, email, and print documents.
You can add the Fixed Column Width command to the Quick Access Toolbar, if that helps (File | Options | Quick Access Toolbar). You'll find it if you first select "All Commands" in the "Choose commands from" drop down.
Alternatively, if you are trying to save a table with specific column widths, you can create a Building Block entry for it. For example, you can do the following to see your table "template" in the Quick Parts gallery: Format an "example table" the way you want it, select it and then click Insert | Quick Parts | Save Selection to Quick Part Gallery.