All lumber direct from the saw is rough lumber. After seasoning, the better grades may be re-sawed into smaller pieces and are frequently planed smooth, on one or both faces and one or both edges, by machinery, before marketing. Lumber thus planed is said to be dressed, and is sold at the width and thickness it had when rough. Examples of designations of dressed lumber are as follows: Sis means surfaced (or dressed) on one side; S1S1E means surfaced on one side and one edge; S2S2E means surfaced on both sides and both edges.