Shih Tzu have long coats and are sometimes called “lion dogs.”
These fancy-looking pups originally hail from China and have long, opulent coats. According to the AKC, Shih Tzu usually weigh between nine and 16 pounds and stand between nine and 10.5 inches at the shoulder. This breed is well-suited to small homes or apartments as they don’t need much exercise and love to snuggle.
Russian Toy Terriers have striking ears and long legs.
Russian Toy Terriers are active and intelligent dogs that usually weigh under 6.5 pounds and stand between eight and 11 inches at the shoulder. They were originally bred in Russia to be companion animals to members of the aristocracy and still love to spend time with their human owners.
What is the smallest dog breed in the world?
The smallest dog breed in the world is a Chihuahua, ranging from 15 to 23 centimeters, or 5.9 to 9 inches in height, according to Purina, a pet food and care company.  Chihuahuas weigh between four to six pounds and can have shorter or longer fur depending on the dog.
The AKC explains Chihuahuas are “sassy pets” with “huge personalities” that enjoy quality time with their owners yet can be on the small side to be around rough children. 
Purina lists toy poodles as the second smallest dog, not exceeding 28 centimeters, or 11 inches in height. AZ Animals notes toy poodles often weigh between six and 10 pounds and can live up to 18 years.
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The SMALLEST DOG BREEDS in the World
The many different breeds of dogs mean theres almost certainly a perfect dog for everyone. Those interested in smaller breeds can find a friend in breeds like Pomeranians or pugs, while those looking for larger canines might fall in love with Great Danes or Bernese Mountain Dogs, says the American Kennel Club.
According to Pet Keen, there are between 195 and 500 different dog breeds, based on different organizations’ recognitions and experimental breeds.