The product description 1. Quality Material – Our puppy collars are made of high density nylon, which is flexible, lightweight and stylish. Silky soft nylon won’t ruffle your furry friend’s feathers. It gives your pet the freedom to play. The different colors allow you to easily identify each of your puppies. 2. Size – available to fit puppies or cats. Measure your dog/cat’s neck circumference before purchase. 3. Buckle – If your pup gets stuck, the buckle loosens quickly under pressure. There is enough resistance in the trigger part, not easy to trigger. Your pup’s weight will break it, but it won’t scratch it. 4.12 bone ID tags, the same color as the collar, allow you to personalize your pup. You can use the self-adhesive labels we provide or you can use a marker. These cute tags are practical and cool for your pets.