His weight is still showing up on the toy weight chart I have
http://pomderosaranch.com/ToyBreedWeightChart.htm
it would show him to be a little less than 6 1/2 lbs full grown..I did use this one for Ginger on her 12 week shots and 15, and it's still giving me the same reading for adult weight..Will check it out again on the next set of shots..I gave it to a girl I know with 3 yorkies, and it was within 1/4 of a pound on all 3 of hers, she said it was the best one she had ever used..of course, there can be some that just get way bigger than we expected, like my 14 lb one..