I got this through an Influenster cash back campaign. I love it so far. It's a simple design and all you need to do is add water in the mat and I could feel it's cooling down. I think this is a pretty good item to have it during the summer. Dirt can be cleaned off easily and good material. Size small is 11"×15" and big enough to cover my 15lb dog's belly (legs and arms come out from the mat though). I could've gotten a larger size but it still works fine.