Welcome to Yorkie Talk!
You're new, so people should be kind: around here, the term "tea cup" isn't used much, because it's sales terminology, usually inaccurate or misleading and designed to separate you from your hard-earned $$$.
Yorkies are Yorkies: there is a "standard", and then there are some who are larger - or smaller - than standard. Sometimes there's joking around about the bigger ones being "tea pots" instead of "tea cups"
, but it's just joking around.
Little ones are adoreable, but also very fragile and need extra care so they don't get hurt. Your pup is still young, and probably still growing. She may surprise you yet and add a whole whopping pound or so before she's done
My Bella didn't stop "growing" until she was over a year old. Just make sure that what you're feeding your furbaby is nutritious and has all the stuff she needs to grow strong and healthy.