What size will your yorkie will be? Generally, a Yorkie is half of its adult size when it's 12 weeks old.
A "teacup" is an unofficial term used to identify adult dogs under 5 pounds. The standard Yorkie size is up to 7 pounds, but some are more. This is not an exact science, so this chart is only for reference.
How to use this chart:
Current age on right side of chart, follow along to current size in ounces = Adult/18 mths size-bottom line
Example:
Current age at Week 12 X current weight of 45 oz = adult weight:6 pounds