I found an old shelf that was just the perfect size that would fit at the end of my table to be used as an iron board.
You will need a piece of wood the size you would like, a towel and your favorite print of fabric.
I cut 1/2" all around the piece of wood for me to be able to staple the towel to the board. Staple the towel on all 4 sides of the piece of wood.
Measure and cut the printed fabric to fit over your board like you would cut a pillow case out.
Sew the sides and hem the top. Place over board. Now you have a portable iron board.