The Long-haired Chihuahua is one of only two types of Chihuahuas. The Chihuahuas are the smallest breed of dog. Chihuahuas are very small dogs. They have large heads and a pointed muzzle. They have prominent, dark eyes, and may have long or short hair. They come in a variety of colours. Puppies sometimes have soft spot in their skull, which may close or may not when they get older. Males and females have similar sizes, with an average height of 6-9 inches and weight of 2-6 pounds. The Long-haired Chihuahua has a fluffy sleek look due to fine, soft guard hairs padded with a soft undercoat.