I don't know actual sizes, but I was told DD#2 was going to be tiny. She was going to be much smaller that DD#1 who came in at 3.4kgs.
It the bigging of my preg they put my dates back as they said bub was too small to be as far along as I knew I was.. It worked itself out by my 13 week scan so OB went with that scan rather than the early one. 19 week scan once again I was told bub was small and may very well be late. DD#2 was born on the EDD calculated from my LMP and wasn't tiny, a good size really a perfect 7lbs.

I really don't take any notice of them at all.
GL with these final weeks!