Wide Color Range: Upgraded puppy collars in 15 colors provide a great solution to easily identify your puppies. Softer material - nylon and polyester with soft double pile, won't hurt puppy's neck. Application: for puppies and kittens 0-8 weeks (suitable for most breeds) Our products are easy to clean, not easy to break, and can be reused for a long time. Adjustable Size: Measures 13.8"L x 0.4"W (35cm*1cm), suitable for fast growing puppies without reluctance. Tips: Please don't overtighten, your puppies will grow quickly. Please check that the Velcro closure is firmly pressed to ensure that the ID straps can hold in place. Rich Color Palette Upgraded collars in 15 colors provide a great solution for identifying and tracking your puppies and kittens. The bright, rich color palette will help you keep an eye on each pup's growth. Comfortable fit The soft double-sided material cares for the puppy's delicate skin more gently. It doesn't itch and is more comfortable than one-sided ID tags pets may wear. Longer Velco We use a longer Velcro closure, the collars are secured around the puppies neck with the extended Velcro closure. Customizable design Each litter strip has a fastening tape at the end, with which fast growing puppies can be easily attached. It is also very good for other small animals.