Teacup & Tiny Chihuahuas
The Chihuahua standard recognizes smooth coat and long coat varieties. There is no such breed as the teacup Chihuahuas. When someone asks me for a teacup Chihuahua, I understand they are looking for the tinier 2-4 lbs Chihuahuas as oppose to the more familiar and possibly healthier 4-6 lbs Chihuahuas.
The tiny or teacup Chihuahuas really are adorable and easy to bring everywhere you go. HOWEVER, they are not suited for all pet owners. They really are delicate, especially as young puppies, and need to be treated accordingly. The tiny or teacup Chihuahuas are not a pet for children, nor do they belong in a busy family with very young children.
Better suited for families and older children is a standard 5-6 lbs Chihuahua. Granted, you must still be very careful when puppies are young. However, they can live happily in a family with responsible adults and gentle compassionate children. Please see Puppy Care Tips for more info.