I bought mine from Quilt In A Day when they had a fantastic sale. Mine is 16 x 24 inches. Check the various sites because there is a big price swing. Some folks buy from places that are for horse padding. The quilt stores have quite a mark up. But since quilters seem to have more sensitive noses I gravitate more to the ones sold by well known stores. QIAD has fairly good prices/sales and I believe have passed the Eleanor Burns quality assurance. My mother used an old wool calvary blanket for years. She folded it up and put it under a cotton ironing board cover. (I have an old calvary blanket but I don't want to destroy it by ironing on it.)