Blueberry Pet Pink Flamingo or Ladybug Designer Dog Harness, Matching Collar & Leash Available Separately Chest Girth 16.5-21.5", Chest Strap 4.5", Width 5/8", Small; The chest strap is not adjustable. For a safe and fit purchase, be sure to check the neck and chest; A properly fitting collar and harness won't leave any room for your dog to chew. The harness does not stretch itself. NEVER leave your dog unattended with a harness on. Made of a tough grosgrain ribbon sewn on to a high density red nylon webbing. This harness is a single product. Its matching collar (B00HRQAN7A) /leash (B00HRQGN4M) sold separately All pictures are taken with our production samples from a size 3/4"(wide) * 19.5-25.5"(chest).