Mount your action camera on your dog with this lightweight, continuously adjustable harness. The harness is available in two sizes (depending on the length of the dog). Choose the appropriate size for your dog by measuring the length of the dog. The measurement is taken from the neck (between the shoulder blades) to the base of the tail. Dogs 38 to 64cm (15 to 25 inches) long should wear the small dog harness and dogs 66 to 92cm (26 to 36 inches) long should wear the large dog harness.