I bought the jumbo size bc I needed it to sleep two medium sized dogs (50lbs and 25-30lbs). The size is great! Both dogs have plenty of space and my two year old even has room to cuddle up with them too.My only complaint is the thickness and firmness of the cushion and the raised sides. My larger dog likes to rest her head on the sides so I was disappointed that they aren't very well stuffed. It does give the dogs a soft enough space on our hard floors but I had hoped for something a bit firmer. I will probably buy a cheap egg shell mattress topper to layer underneath to give a little extra comfort. That's just me though.Over all I am happy with the purchase. It meets my initial requirement which was the size.