Hardwood timbers are available up to 26 feet long. Pine timbers are available 18 feet and longer. Common sizes include: 3×5, 3×6, 4×4, 4×6, 4×8, 4×10, 5×7, 5×8, 5×10, 6×6, 6×8, 6×10, 8×8, 8×10, 8×12, 10×10, 10×12, 10×14, 12×12, 12×14, 12×16, 14×14, 14×16, 14×18.