The first time I sawed for a many times repeat customer, I had to learn his lingo. 4's and 6's meant exactly that; he wants 2X4's & 2X6's. All of the rest he wants sawn into "lumber". That means various widths of 1" lumber, whatever the log will make. Square the cant up and saw. Doesn't matter whatever the width is. He calls it "farm lumber", I call it "easy sawing".