Lucky you to have a "Teapot" on your hands.
The standard, already mentioned, is 7lbs and under.
There are many Yorkies above the standard but they are
still Yorkies. Buddy is 16lbs and he's so handsome.
Congratulations. If your not breeding you won't be
dissapointed.
In case you weren't aware the original Yorkie was up
to 22lbs.
Enjoy,