Sliding collar size: S code diameter about 0.8cm, length 40cm, Sliding collar design: unique P-collar design, perfect for effective and safe training Dogs Pulling the Leash Premium Material: The dog collar is made from the highest quality nylon materials with a custom leather connection. This dog training collar is washable Comfortable dog collar: The collar is lightweight and the material is excellent, which brings your dog a comfortable experience, giving him less restraint and more comfort. Powerful: The sliding collar can prevent the dog from suddenly rushing forward, which is more conducive to your dog control. At the same time, this dog training collar is a great choice for a dog who likes to pull on a leash Note: The data are manual measurement, please allow a 1-3cm error, due to the differences between the light and the display, there will be a certain color difference, the specific received in kind prevail.