Chihuahuas are one of the smallest dog breeds, typically weighing between 2 to 6 pounds. They are known for their large, expressive eyes and distinctive ears, which can be either erect or floppy. Chihuahuas come in various colors and coat types, including smooth and long-haired varieties. These dogs are often characterized by their lively and confident personalities. Despite their small size, Chihuahuas can be quite bold and may exhibit protective behaviors towards their owners. They are popular as companion animals and can adapt well to various living environments, including apartments.