Etelle,
I thought u'll extract e chart from yahoo! groups. ;p
@ 5 mths, Ian's height is 65cm, and weight is 8.2kg.
Me & my hubby both quite tall, but our fat boy also not very tall lei... I'm 1.72 & my HB is 1.82.
But we're not worried lah, coz my HB also avg height when young...