Blueberry Pet Step-in Harnesses, Chest Girth 19.5" - 25.5", Medium, Nautical Flags Inspired Designer Dog Harness Chest Girth 19.5-25.5", Chest Strap 6", Width 3/4"; 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 high density polyester, which imparts softness and durability to the product. This harness is a single product. However, it comes with matching collar/leash to complete the look. Collar and leash sold separately. All pictures are taken with our production samples from a size 3/4"(wide) * 19.5-25.5"(chest).