Grow With Me Puppy & Kitten Whelping ID Collars Newborn Kitten Collars, Newborn Puppy Collars Quantity 10 Colorful Collars Self clinging means no bulky buckles! 10 colors include: Red, Orange, Yellow, Green, Blue, Purple, Black, White, Brown, Tan So what size collar do you need? We suggest SMALL BREED/KITTEN (8inch/20cm) to be suitable for puppies and kittens whose breeds mature to 20lbs or less when full grown. Choose MEDIUM/LARGE BREED (12 inches/30 cm) for puppies whose breeds mature to 20-60lbs when full grown. Our best seller is 3/8" width but if you'd like to get a sturdier collar, choose the WIDE 1/2 inch width. LARGE BREED (16 inches/40cm) will be suitable for puppies whose breeds mature to 40-100lbs when full grown. 3/8 inch width is our best seller! Choose WIDE for a larger, 1/2 inch width. This is good for larger breeds or sturdier collar. Our customers have been happy with the standard 3/8" collar on breeds like Golden Retrievers, Coonhounds, Labs, Pittbulls and other medium/large breed dogs. The width is a personal preference. Our customer experience says these collars are widely accepted by most puppies. Quick and easy to adjust while puppies and kittens rapidly grow in that first 10 weeks of life.