One of the smallest toy dogs is the Yorkshire terrier. What they lack in size, they make up for their great personality. They make for the perfect pet because at their size, it is easy to handle them. The best words that describe this breed are trainable, lively and loving. Called Yorkies, despite their size, they tend to bully bigger dogs in a funny manner. Average height is between 8 inches and 9 inches and weighs between 4 lbs. and 7 lbs.