The desk top measures 39" X 69". It extends 15" on one side, creating a counter overhang for a second crafter. The top is supported by a 1X3 frame fashioned after the desk design shared on Ana's brag post (pg. 7 as of this writing). The room has a tile floor, so adhesive-backed felt strips were placed on the bottom of the bookcase units, making it easier to pull the desk into the middle of the room should I need to access my work from both sides.
A lumber yard cut all the pieces. Next time I would use 1X12s for the two side pieces.