I used a 2' by 4' piece of underlayment from Lowe's (about $6) and covered it with lining and scrap batting, then made a cover like a pillowcase so I could take it off and wash it. The case fabric was from the clearance shelf at Jo-Ann, and is home decorator weight. I can put it on any surface to iron, then slide it behind something if I don't need it, meaning I don't have valuable real estate locked into an ironing station. I think I have less than $15 in the whole thing.
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