For small dogs. This item was given to me by an acquaintance, and I've used it a few times to test it out. It barely fit my pug (approx. 6kg). My acquaintance bought it used, so it seems it has been used by several dogs. I think it shows signs of use. Height: approx. 20cm, Width: approx. 16cm, Length: approx. 33cm The blue walking assist device is size M. There are no instructions, so I don't know the correct way to put it on. I hope the buyer can figure it out and use it. There are scratches and stains, so please refrain from purchasing if you are sensitive to such things.