Features: Package Includes: You will receive 15 pcs puppy collars of assorted colors, sufficient enough to meet your needs. Material: These puppy ID collars are made of premium nylon material, very lightweight, which is very comfortable and soft to your pets. You don'for t need to worry about your newborn pets' skin will be scratched by it. Adjustable collars: The whelp identification collars are adjustable; The growth rate of the newborn pets is very fast, so you can adjust the tightness of the whelp identification collars in line with the newborn pet's growth rate. 3 Sizes: The adjustable puppy collars have 3 sizes, which are suitable for pets up to 3 months old; If the length of the puppy collar is too long, you can cut it to the length you need. Identify your newborn pet easily: The puppy whelping collars are good instruments for you to keep track and identify your newborn pet easily; You can take care of the newborn pets conveniently. Specifications: Material: Nylon S Length: Approx. 200mm/7.87 inches for M Length: Approx. 300mm/11.for 81 inches L Length: Approx. 350mm/13.78 inches Type: S, L, for M Package Includes: 1 Bag Puppy ID Collars (15 Colors) note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.