The Chihuahua (/tʃɪˈwɑːwə, -wɑː, -ˈwaʊ.ə/ (listen); Spanish: chihuahueño) is the smallest breed of dog, and is named after the Mexican state of Chihuahua. Breed standards for this dog do not generally specify a height; only a weight and a description of their overall proportions. Generally, the height ranges between 6 and 9 in (15 and 23 cm); however, some dogs grow as tall as 30 to 38 cm (12 to 15 in). Both British and American breed standards state that a Chihuahua must not weigh more than 5.9 lb (2.7 kg) for conformation. Chihuahuas: Everything about purchase, care, nutrition, behavior, and training. Hauppauge, NY: Barron’s Educational Series, p. 7: 'Only in 1904 did the American Kennel Club (AKC) register its first Chihuahua; a total of five were registered that year.”.