Hubby made me one that is 20 X 58 and it is perfect. Since I had an extra ironing board, he screwed the wooden top onto the ironing board, so that it is permanent. I can still fold it up to put away like the regular ironing board. Boy has it made a difference in how much easier it is to sew. Especially since I use lots of starch and I can cover a large area at a time. Had not heard about the holes, so think I may drill some just in case.