1 ChihuahuaChihuahua is the smallest breed of dog in the world. This small and spunky dog weigh a feather-light 4-6 pounds, and is 6-10 inches tall. They have a rounded head, erect ears and rounded eyes. Chihuahuas can be either long-haired or short-haired and this small puppies range in color from white to black and a very wide variety in between. The average lifespan for a Chihuahua is between 12 and 20 years.
2 Yorkshire TerrierComing in at number two on the list of top ten smallest dog breeds in the world is Yorkshire Terrier. This tiny breed typically stand around 7-8 inches tall and weigh 7-12 pounds. Suitable for apartment life, Yorkies have a small head, black medium sized eyes and V shaped ears. The long, silky hair comes in different colors – steel blue and tan. The average lifespan for a Chihuahua is between 13 to 20 years.