This is a four-wheeled walker for small dogs. It's helpful for rehabilitation, feeding assistance, and care for dogs with weakened hind legs. I purchased it in September and used it until November. It was used for a small dog weighing about 4.3 kg. The harness part can be adjusted for height and front-to-back movement. The weight of the main body at the time of purchase was about 820g. *Dog's size when the walker was made: ① From chest to buttocks: 29cm ② Distance between front and hind legs: 18cm ③ Height of hind legs: 15cm ④ Maximum body width: 12cm Buttocks: 10cm *Walker dimensions: Total length of the walker: 50cm From chest to buttocks: 29cm Distance between front and hind legs: 18cm Height of hind legs: 15cm Inner width around the front legs: 15.5cm Inner width around the buttocks: 15cm I wish I had used it sooner, before the front legs also became weak. I hope this will be helpful to someone. Dog wheelchair, dog walker