SMALL: 17.8cm - 26cm Neck, MEDIUM: 21.6cm - 34cm Neck. Width: 1 cm. 14 pcs/set, come with 14 different colors, easy identificationDesign for puppies from birth to 10 weeks old,also can be used for cat,kitten,bunnies,guinea pigs and other small animalsMade of soft nylon material, is washable, colorfast and reusable.A great tool for breeders or farmers to easily identify animalsEasy to adjust, with safety quick release buckle, it is safe to wear and take offThere are two weight record keeping charts with daily weight or weekly weight for Breeders.The metal D ring is great for you to attach the ID tag or leashOur puppy id collars come with 14 different colors which can help you identify your puppies and kittens easily. Our brightly colored puppy collars are the perfect choice for pet owners and breeders to make it simpler and easier to keep track of pups and kittens as they grow older to track their health, weight, behavior and more to ensure a healthier life for your lovely pups Features: 1.Come with 14 different colors,bright colors,They are distinct which makes you easier to identify similar pups. 2.Unmatched quality,Adorable product,well-made.Each ID collar is super-soft and adjustable to provide a comfy fit. 3.The breakaway safe buckle releases when pressure is applied,it makes our collar very safe for pet, but when the pet is playing,it will not fall off. 4.There are two weight record keeping charts,Perfect for breeders,owners,and farmers that want to keep an eye on their pet's health,weight and more. 5.Easy to clean and fast to dry,simply machine wash and these will be good as new. 6.Can also be used for smaller animals such as cats,hamster,bunnies,guinea pigs and more. Package Include: 14 PCS & 2 Paper Cards Material: the highest quality soft Nylon Small: 17.8cm - 26cm in length; 1.0 cm in width Medium: 21.6cm - 34cm in length; 1.0 cm in width Features: Easy to recognize;Soft;Adjustable;Breakaway;Safe Main Color: purple,organge,yellow,coffee,black,silver,bule,fluorescent green,green,hot pin,light pin,red,sky blue,navy blue. Target Audience: Puppies,Cats,and for smaller animals such as hamster, bunnies, guinea pigs and more Special Note: Our ID Collars are for small pets,Please make sure check your pet's neck girth is fit the size before purchasing the items.