The Moss Hollow Harness 'n Lead Set is the perfect way for pet owners to safely explore the great outdoors with their small furry companion. This set is ideal for very small pets, such as cats, rabbits, or small dog breeds, with precise sizing to ensure a comfortable and secure fit. To find the perfect size, simply measure your pet's neck and waist circumference and refer to the provided chart: Small (Neck: 3.94"-5.91", Waist: 7.87"-10.04"), Medium (Neck: 5.91"-7.87", Waist: 10.04"-12.01"), and Large (Neck: 7.87"-10.04", Waist: 12.01"-13.98"). The set is designed to keep your pet safe and comfortable while you enjoy fun adventures together.