Mine went like this:
DS - 8 pound 2.5 (but was born at 39 weeks)
Dd1 - 8 pound 11.5 (42 weeks)
Dd2 - 8 pound 10 (41+5)
dd3- 7 pound 12 (41+4)

Dd2 had the bigger head but easier to push out than her little sister. Dd1 was my longest baby which probably makes up for the weight difference.

Good luck!!!