Making a "big board" is easy & actually just sits on top of your existing standard board (it does not need to be attached, it is heavy enough to stay put) ....the top size is 24" x 60" (although you can make it as large as you want as long as your existing ironing board will support it) ...you use 1/2 birch plywood (cabinet grade) ...on the bottom of this 24 x 60 top attach 3 slats (approx 3/4 x 3/4) two are long (about 48 inches) and one is short (you will form a large "U" on the bottom of the 24 x 60 top) ...space the two long slats about 1 inch wider than the top of the short demension of your existing ironing board top ...attach the short slat at one end of the two long slats to form the "U" (this "U" will prevent the board from moving in 3 directions) ...to finish use thin cotton batting for padding (one or two thicknesses) and cover with a canvas material or the silver iron board cover material ...to get fancy attaching the cover sew a draw sting pocket around the edge or attach elastic & voila