I cut my older patterns down, but not to 6" x 6". I wanted to be able to put them in a standard file cabinet, so I cut them down to 8 1/2" x 12" - basically, I just lopped 3 1/2" off of one side. If I had multiples of a pattern, I turned one a quarter turn, so the pattern got cut in a different place on the second one than on the first. I cut 3" x 3" squares from the strip I lopped off, punched a hole in the corner and put them on a book ring so I can flip through and see what I want to use before I go to the drawers, where they are arranged by color/pattern. I write the name of the manufacturer/collection on the back of the square for reference, as well. There are some that I can't bear to chop up, though, so I still have 12" x 12" storage, too - just not as much!
Happy for no reason...