Yesterday I saw a baby a month younger than my son and she had a big head. Was also looking through pictures of my first son and he also had a big head he was always in the 80% on the charts. I looked at my second son 4 month check up to see what percent he’s at at he measured 16.25” so at the 35%. Got me a little worried, is this about normal for head circumference for 4 month old?? He’s now 5 months he has his 6 month check up in September. I’m I just used to my first having a big head 😆?