A Chihuahua typically grows to weigh less than 6 pounds as an adult. The breed stands from 6 to 9 inches tall, and there is no notable difference in size between males and females.
Chihuahuas have no major health concerns and a few minor ones, so the small breed can have a long lifespan of up to 18 years. These dogs are easy to train, energetic, friendly with other pets and affectionate, making them a good companion animal. They are best kept indoors and have few maintenance needs. Some types of Chihuahuas with longer hair may require regular brushing each week to control loose hair and matting.