We have 4 sizes to choose from. The corresponding hind leg circumferences are: S 25-35cm, M 35-45cm, L 42-52cm, XL 52-64cm. Please measure your dogs hind leg circumferences first. Make a purchase The fabric in contact with the dog is sandwich mesh, which is light and breathable, has a rebound function, and provides cushioning protection for the dog; Hip buckle + hand-held Japanese word buckle adjustment. The carrying position can be adjusted according to the walking height of people and dogs; The handle is made of cotton PU material, which feels good. When carrying the dog for a long time, don't strangle your hand and give the grip a blessing; The support handle allows you to lift your dog easily; when helping your dog, use a lifting leash extender to reduce the pressure on your back The harness can be easily adjusted, so you can find the most suitable one according to the needs of your pet; please be sure to check the size chart to find the most suitable size for your four-legged friend A full-body seat belt allows you to help your best friend get in and out of the car, take a walk or go to the toilet