High Quality MaterialThe puppy collars are made of high quality nylon and metal, they are comfortable to wear, durable and strong in use Adjustable Puppy CollarThese adjustable safety puppy collar can be adjusted from 19- 32cm(Medium), 0.4inch(1 cm) in width. When measuring puppies, please leave a space of about 2 fingers. Collars are suitable for most types of newborn dogs 12 Vivid ColorsEach puppy collar set contain 12 quick release collar of 12 different color, You can choose the color according to your mood Safety Release BuckleOur puppy ID collar is adjustable in length and comes with a safety buckle.Breakaway safe buckle releases when pressure is applied, very safe for puppies, and convenient for you to open it.