Blueberry Pet 10 Patterns Geometric Designer Dog Collars & 7 Patterns Personalized Collars, Matching Leash & Harness Available Separately Neck 14.5"-20", Width 3/4", Size Medium; The collar does not stretch itself, please make sure leave ONLY 2 fingers between collar and dog neck. A properly fitting collar and harness won't leave any room for your dog to chew. The collar is not for tie out. NEVER leave your dog unattended with a collar on. This collar is a single product. However, it comes with matching leash/harness to complete the look. Leash and harness sold separately. Made of high density polyester, which imparts softness and durability to the product. Those buckles are made from ecofriendly plastic. The metal D ring is chrome coated to add durability. All pictures are taken with our production samples from a size of Medium; Please measure your pets carefully for making the right purchase. Always look at the size chart for the recommended weight range to confirm the size.