The Chihuahua is graceful, small and compact; it is slightly longer than it is tall. It has a saucy expression and an alert, terrier-like attitude. It should move out at a swift pace with good reach and drive. Its coat can be smooth, with soft, glossy hair or long, with soft straight or wavy hair and fringed ears.

The saucy Chihuahua has earned its place as a favored toy dog because of its intense devotion to a single person. It is reserved with strangers but good with other household dogs and pets. Some try to be protective, but they are not very effective. Some may be quite bold; others may be timid. It is often temperamental. Some bark.