The door fits perfect in our balcony door. I tried the one from Bunnings before and theirs have a really big step at the bottom. Our dog has short legs but wide body, so it was too hard for her to step over that without having her belly scratched. But the La Luna door is thin and low from the ground to the actual window hole and it's perfect. However, the window itself is too big, we needed it to be more like a square (short and wide dog). Although we got the safety bar, it does feel a little unsafe of a night time as a person can go through the hole.