PREMIUM OVERSIZED PATCH: Includes a large highly visible metallic patch embroidered with the words "Emotional Support Animal E.S.A." SECURE: This harness includes a built-In leash attachment also a adjustable girth and chest strap ALL SIZES AVAILABLE: From small to large dogs we have the size to fit. Perfect for all size Emotional Support Dogs that will either be walking or in a carrier on a long flight. COMFORTABLE: Cool lightweight vest with mesh sides, perfect for all year wear in any state. MEASURE YOUR DOG: Be sure to measure your dogs girth for the correct size.To measure for your dogs girth, wrap a flexible tape measure behind his front legs and around his body, going underneath the widest part of his rib cage.