I bought the small cot (26" X 26") for my pembroke corgi and it is the perfect size for her. She was excited about this cot from the moment I opened the box and popped it open. She loves to lay on it while we are outside on our patio. And because it  folds up and is so portable, we take it down to the beach with us and after our walk, she lays on her cot while we lounge on our beach chairs and enjoy the day. This was a great purchase and was delivered very quickly. I highly recommend!