Hi redheads249, Thank you for posting your question here. We do have a few covers included with the seats. Each one will list the dimensions on the details tab under the image. http://www.overstock.com/Home-Garden/Toilet-Seats/21162/subcat.html?CID=206932 I hope that one of these will work for you. If this is not what you're looking for, please let us know and we'll be happy to help!

Do you have any waterbed mattress pads?

Hi kidteacher2, We have a few water bed systems, but don't have any mattress pads designed specifically for water beds. Here is a link to what we have in our water bed category in case it helps. http://www.overstock.com/Home-Garden/Mattresses/Water-Bed,/mattress-type,/2019/subcat.html?cid=206932

Hi Redheads249. I had the same problem with the toilet lid covers from Target which were supposed to fit elongated toilet lids. Try Walmart, I was able to find one that did fit there.