Fits my newly rescued GSD puppy (she’s only 8 months and 62 lbs) and my 35 lb mutt. The GSD will definitely outgrow it because it’s just not tall enough for her to stand up fully, but for sleeping and lying down it works. She goes in by herself and they snuggle up together but there’s also lots of room lengthwise for them. I put it together by myself. Some of the “locking hardware” was very difficult to turn. The back is just two pressboard pieces you have to manually attach with 40 screws and a Philips screwdriver. The latches on one door also don’t line up and are hard to open and close. My main complaint is that it’s NOT CHEW PROOF. Not even a little. My dog has completely chewed through the doors and edges within 2 days. I wish I would have gotten something more durable.