I agree with the everyone, it's very hard to tell how big your Yorkie will be. Chloe wasnt 3 pounds at 12 weeks but thats what she weighs at 3 years. Personally I am much happier that she isn't a wee little tiny one as they are prone to more health issues. The breed standard for weight is 5-7 pounds but thats just a guideline, there are many adorable cuties that are considerably larger
Congrats on your upcoming new arrival, you will be amazed at how quickly you will fall head over heels in love with your Yorkie. They truly are the most incredible dogs!!