From what I've read teacup was a made up term to sell the runt of the litter for a higher price. We love our babies whatever size they are. Society has this image of these li'l dogs, Lil skinny women, like get real. Yorkies should not be bread to be super small. It's not safe for the mom and tiny babies can have extra health issues. Jada is 4lbs. I did not set out for a "teacup" just a yorkie. They are beautiful no matter what size