Jeesh it's hard to say. My Ozzy was 2.9oz at 9 1/2 weeks. He is now right about 6 months and 3lbs 12oz. His Dad was 4.5 and Mom 6.75. He is taking more after his Dad and will probably be about 5 lbs maybe 5.5. I know a few others in his litter are much bigger than him though so you'll just have to wait and see....
Your pup should be within standard (7 lbs) but there is no guatantee and those bigger teapots (over 7) sure are cute...more of them to love