ID Collars Package:Contains 12 PCS,Length:35 CM.Width:1 CM.The length is adjustable,You could adjust the length as per puppies grow and stay on well. High Quality:The puppy indentification collars are made from nylon and polyester,Designed with hook and loop tape.The ID collars both sides with velvet,Its soft and comfortable for your pets. Easy to Use:The Indentification collars are designed with adjustable hook and loop,suitable for each pets size.Only need to put them on puppy neck,You could adjust the ID collar length as per pets neck size.You could identify them with collars color. Identify newborn pets: The assorted colors puppy collars bands could help you keep track and indentify puppy easily. Suitable for more Pets: The ID collars are widely use on puppies and kittens from birth to 8 weeks old,More color for your choice.