How long is a standard 4x4?

A standard 4x4 lumber typically measures 3.5 inches by 3.5 inches in cross-section and is commonly available in lengths of 8, 10, 12, 14, and 16 feet. However, the actual dimensions can slightly vary due to milling and drying processes. The term "4x4" refers to its nominal size before it is planed and dried.