Coastal Pet -Size Right Adjustable Harness Red 12 to 18 Inches, Width 3/8" Adjustable Nylon Dog Harness. Color: red. Width: 3/8". Adjustable size: 12-18". Simple in use. Just place it over the dog's head, snap the buckle around the girth with our contoured snap-lock buckle. The comfort pad with a swivel O-ring allow dogs to move freely without the leash tangling around their legs. Effective for dogs who try to back out of a harness. Ideal for everyday use.