I also made myself a big board. I used a 1/4 sheet of plywood that they cut for me at Lowes. I covered it with batting and the teflon fabric from JoAnns. I have since covered that with muslin. I glued a three sided frame of 1x1 molding on the bottom to make it fit snuggly on my kitchen island top. It makes a great ironing surface and is just the right height. I purchased the kitchen island at one of those unfinished furniture places. It has a large shallow drawer and two shelves underneath and is on wheels. It acts as storage, cutting and ironing surface.
One major drawback is the extra width. I have some serious health problems and am not getting any younger. I have discovered that the extra width is wonderful for ironing or cutting but allows me to over reach. My back is not happy.