I chose this bed because the manufacturer described it as "luxury from top to bottom". I have a Whippet, a medium size 24 lb. dog, so the medium size bed, at 30 inches, should be ample. I don't know what kind of measuring instrument they used, but you can't make this bed stretch to 30" x 25" if two people squash it down and pull on it in all directions. My dog can't even curl up in it unless part of her body is on the floor. She is asleep on it now, because it's the only bed in the room, but her head is lying on the hardwood floor. It's disappointing because I ordered this in advance of her being released from the hospital so she would have a comfortable place to recuperate. Not only is the bed small, the cushion isn't thick enough to keep her body from sinking to the floor. This 'medium' size bed is made for a small, and lightweight, dog.