| Sr.No. | Nominal Wood Size | Actual Wood Size |
| 1 | 1" x 4" | ¾" x 3-½" |
| 2 | 1" x 6" | ¾" x 5-½" |
| 3 | 2" x 2" | 1-½" x 1-½" |
| 4 | 2" x 4" | 1-½" x 3-½" |
| 5 | 2" x 6" | 1-½" x 5-½" |
| 6 | 2" x 8" | 1-½" x 7-½" |
| 7 | 2" x10" | 1-½" x 9-½" |
| 8 | 4" x 4" | 3-½" x 3-½" |
| Sr. No. | Timber | Lumber |
| 1 | Timber is a tree or erect wood which has not yet been processed | 'Lumber', on the other hand, is used to describe processed wood products used for furniture making, home construction and the like |
| 2 | Some people use the term ‘timber’ to refer to a piece of wood with bark | whereas ‘lumber’ is used for a bark-less piece of dry processed-wood. |
| 3 | The term timber is used for the same product. Again in U.S. & Canada, timber refers to a relatively small piece of lumber (127 mm dry processed-wood) | The use of both words varies with geography. In U.S. & Canada, Lumber is used to refer to wooden boards, whereas in the U.K. and Australia, |
| 4 | Timber, on the other hand, has its roots dating back to the 7th century. The word was widely in use among people of the time. | The word ‘Lumber’ came into usage as early as the 16th century only and owes its origin to Italy. It has reference to the early pawnshops which housed old, discarded furniture which was difficult to move. |
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