I have to give kudos to the organization that Tessa is in foster care through in Taiwan, called TWCA. They have been awesome about getting us updated pictures, videos and measurements.
As of the end of May (just shy of 5 months) Tessa weighed 13.5 lbs and was 23 inches long. That means she grew an inch and gained 1/2 lb in the last month.
Edited to add: I just looked up Sara's size at 5 months...she was 2 inches longer and 3 lbs heavier! Tessa is definitely a peanut!