O/T average head size of a 2 yr old???

Here's a site where you can look at the different growth charts and see where his height, weight, HC, and height/weight ratio fit in. My daughter is 75% for height, 5% for weight, and her head is now up to 25%, it had been at 5%. Each child is different and there may be a bio-family tendency for small heads. However, if there are other signs of FAE, I wouldn't discount the small head being nothing. It must hurt, but I'd say do whatever follow up is needed.