When bringing a leash to your dog, you should pay attention to whether the size of the leash is appropriate. It cannot be too big or too small. If it is too big, the dog may fall off the leash. If it is too small, the dog may be strangled. Also pay attention to the style of the traction rope. If you have a large dog, you need to choose a thicker and stronger rope, while for a small dog, you can choose a thinner rope.