Blueberry Pet Soft & Comfortable 3M Reflective Pastel Colors Padded Dog Harness, 4 Colors, Matching Collar & Leash Available Separately Chest Girth 23.5-29.5", Chest Strap 7", Width 1", M/L; 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. The 3M reflective threads are only stitched in part of the nylon polyester webbing. Not the entire webbing is embedded with reflective threads. The misty blue color buckles are made of eco-friendly plastic, which matches the color of the webbing. The loop tied to the logo is specifically designed for the purpose of attaching dog charms, tags, pendants or accessories. Please do not attach any dog leash with this loop. This harness is a single product. Its matching collar (B00ZP4A30I) /leash (B01FJKKMU8) sold separately All pictures are taken with our production samples from a size 3/4"(wide) * 19.5-25.5"(chest).