The Size Right Adjustable Nylon Harness Display contains 24 pieces, including 2 each of the Harnesses in 4 sizes and 3 colors. The Size Right Adjustable Nylon Dog Harness is simple to use. Just place it over the dog's head and snap the buckle around the girth with the contoured snap-lock buckle. These figure "8" styled harnesses are completely adjustable for the perfect fit, with a swivel O-ring will allow dogs to move freely without having the leash tangle. They are effective for dogs who try to back out of a harness. "Coastal reserves the right to ship kits incomplete with no substitutions."