A teacup Yorkie weighs between 1 and 3 pounds as an adult dog. Teacup Yorkies are not a breed, and official breed standards for showing an adult Yorkshire Terrier insist that a Yorkie must weigh between 4 and 7 pounds.
The term "teacup" is used to describe an adult Yorkie that weighs fewer than 4 pounds. However, according to breed standard, a Yorkshire Terrier typically weighs under 7 pounds and is considered a small breed dog regardless of its weight. Famous for her small size is Sylvia, an English Yorkie who was the smallest dog in recorded history as of 2014. She weighed just 4 ounces and stood 2.5 inches tall.