This thing is HUGE and very cushy! My 13 year old chocolate lab wasn't sure what to make of it when it arrived but once she climbed in- she loved it. She is currently on it snoring. A grommet popped off when she got on it but it was easily put back in place. 
Size: my lab is 65 pounds. I have another lab (not pictured) that is 85 pounds, they both fit nicely on it.