I read in a lot of places (including here) that it is more likely in Autistics to have a bigger head, so I don't quite know why this thread is talking about having small heads is an Aspie thing. My head is average for my build.
People do have different size heads depending on their build. Big-built men have bigger heads, and small, petite women have smaller heads. People with thick hair have heads that look big, but aren't actually that big. I always worried that my head looked big, but then I found it is just because I have really thick hair, and when I had it thinned out a few weeks ago, my head then looked smaller.
I didn't have a big head when I was a baby either. I read somewhere that baby boys are born with a slightly bigger head than baby girls.
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Female