For people that prefer small dogs, or have restrictions on the size of an allowed pet, these are the dog breeds that typically fall under 25 pounds, or are in the Toy dog breed category (according the AKC classifications).
Italian Greyhound
Maltese
Japanese Chin
Pug
Shih Tzu
A small, sturdy and compact dog with a long, flowing double coat, the Shih Tzu is the epitome of a lap dog. With a coat of any color, the Shih Tzu lacks the fragility of other toy breeds, making him the perfect companion for almost every household member. He is a tolerant, happy and affectionate little dog, and easily mixing with other animals in a home.Shih Tzu Gallery