Our 2×4 SPF is sold by the board in 8′ lengths only. Kiln-dried and Select Premium grade for a step up from #2 grade. This spruce pine fir is a more economical choice and often used for construction, rustic furniture making and bed frames. Boards are S4S where both sides and edges are planed smooth. Actual board dimension is 1-1/2″ thick by 3-1/2″ wide.