The product 1. [Multi-color Safety] A set of collars containing a number of different colors, enough to meet your needs, let you easily identify your puppy, boy and girl puppies are very cute. If your puppy gets stuck in something, the clasp automatically and quickly releases under pressure. There is enough resistance in the tripping part, not easy to tripping.2. Comfortable and durable: Silky nylon won't piss off your furry friends. It gives your pet the freedom to play. Our dog collars are made of quality materials and are strong and durable. Colorfast means that the collar does not fade, so it can always maintain a distinct identification function. Machine washable for long time reuse.3. Our dog collars in 2 sizes, S -(adjustable from 6.8 - 10.2 inches,2 or 5 inches wide), -M -(adjustable from 9.0 - 12.0 inches,2 or 5 inches wide), measure your puppy before purchasing (with rope or tape measure), each size is adjustable and easy to operate to meet your growing puppy4. This aluminum dog tag comes in 12 colors to match the collar. It's a cool idea to choose different colors based on the puppy's personality. In case you lose your puppy when you take it out. Of course, it's better if you have other ways to sculpt.