Mine were 4 & 4.5 pounds at 11 weeks and are now 10 & 12 pounds at 8 months. A bit bigger than I expected but there are some advantages to it & they are still little dogs who are part of our family who we absolutely LOVE
I was saying one day how I wished they were a bit smaller and my husband said "If they were itty bitty we might have broken them by now!" (they jump & play so much I'm glad they're not SO fragile). I agree with the other comments though...you never know with yorkies what size they will be, they all seem to have minds of their own!!