i also linked to the cushion on amazon and all the hardware! the base and side pieces of this frame are 2×4″ that we ripped to 3″. add a line of wood glue to the end of your plywood and attach these boards through the pocket holes in the plywood and into each board using 1.25″ pocket hole screws. add 1.5″ pocket holes to the very top of the 4″ wide boards and add 1.5″ pocket hole screws to the …