Hey C. -
my story is like everyone else's here. My son was 9 lbs 1 oz at birth and 21 1/2 inches long. He had a HUGE noggin.
We always joked about how he must have all the brains of the family.
Throughout his first year, he was 95% plus in everything - his head was off the charts. We weren't worried, but our ped was. She suggested testing to see if anything was wrong.
I respectfully told her, look at our heads. Neither of us could EVER wear a baseball cap. We are the BIG HEAD family. Nothing was ever done - but my son's size was carefully monitored.
He's gonna be 4 next week and his body has caught up to his head. While he is at about 90% for height, his weight and head are about 75%.
Trust your gut. If you think it's ok - don't worry about it. If things look odd - then look into some testing.
Chances are, you got a precious big headed kid like us. (It's all those brains!)
D. in milwaukee