I bought this replacement ironing board cover and actually stuck it over my old one. It is a "one size fits most" design, so you need to take your time fitting it and slowly tightening the drawstring. I imagine if you pull too hard you might damage it. The length was just long enough for my ironing board, so if your ironing board measures as the maximum recommended length for this product, maybe consider a larger one. That being said, I did put this cover over my old one - so without this it may have fit easier. It's great quality - the top fabric is nice and the padding quite thick.