Coastal Pet Products DCP603320MD Nylon Walk Right Control Dog Harness, Medium, Black Holt Adjustable Dog Control Harness, black, small. Neck size: 8" - 14", girth size: 14" - 20". This harness is designed to apply even pressure without pinching behind the dog's front legs. It easily calms over-boisterous dogs. This dog control harness will help make walks an enjoyable experience for you and your dog.