Whether you call them teacup Chihuahuas or “pocket Chihuahuas,” these little guys are tiny. When they’re puppies they actually will fit into your teacup. Although these terms are not official breed designations, they’re descriptive enough to let you know you’re talking about the smallest members of a tiny breed.
The only thing that makes a teacup chihuahua breeds different from any other Chihuahua is its size. Even a “big” Chihuahua shouldn’t weigh over 6 pounds. But there’s no minimum weight that applies, and teacups usually weigh in at 3 pounds or less. While you can argue all day about whether size matters or not, many folks find tiny dogs like to be definitely desirable. Be aware that a tiny puppy may still grow into a full-sized adult, so if your heart is set on small, look at the parents, too. Small parents make it more likely that the pup will stay small as well.