The Chihuahua (Spanish: Chihuahueño) is the smallest breed of dog in the world and is named after the state of Chihuahua in Mexico.(Wikipedia)
Generally, the height ranges between 6 and 10 inches (15 to 25 cm) at the withers(Wikipedia)
Chihuahuas are prized for their devotion, ferocity, and personality. Their curious personality and small size make them easily adaptable to a variety of environments, including the city and small apartments.(Wikipedia)