Our 2×4 Yellow Pine lumber is sold in 93″ studs, 8′, 10′, 12′ and 16′ lengths in #1 Grade. This grade still allows for knots and wane, but will have fewer and smaller knots than the #2 grade. Boards are S4S where both sides and edges are planed smooth. Actual board dimension is a 1-1/2″ thick by 3-1/2″ wide.