lol, well, you can all just tell them that your baby's parents didn't read the standard!
If they're a larger Yorkie, and people question it, you could say that they're a passage to the past when back in the day of "Ben", Yorkie's used to be between 10 and 18 pounds.
It's not until the 50's I belive that we started breeding them down to the 4-7 pound "preference" of the breed club.