I've had this set up for about a week. My [pet] used it once, but is now wary and won't use it, so I'm putting it up for sale. ※From the manufacturer's website: Outer dimensions: Width 50cm x Depth 35cm x Height 27cm Inner dimensions: Width 45cm x Depth 25cm Entrance width: 20cm / Height to entrance: 17cm Please refrain from purchasing if you are concerned about minor scratches or dents, as it is made of stainless steel. I am also selling a deep L-size set with steps from the same shop.