I recently refinanced my home and most of the documents were legal sized. Try putting those in a standard file. Now I have all of my mortgage paperwork in one file box that fits up on a shelf but I can easily find what I'm looking for.
In order to put more related items together in one file folder I find it more acceptable to use the box bottom file folders. They are available in letter and legal sizes to accommodate one's needs. Pleased that Staples has them.