We have the large one, which is the biggest, and if she stretches out she is almost covering it length wise, it stays in the living room or in our bedroom depending on how hot it was that day, today we are looking at upper 70s and 80s tomorrow, so we will be sleeping on it. I wish they made a giant one because I know that as soon as she gets her size in she probably won't fit on it all the way. I will take the measurements today when I get home from work and let you know, well going to be late again, talk to you guys later.