I think Buffista children come in two sizes: tiny (see Olivia, Lillian, Matilda, Emeline), and large (see my kids, Mallory, Laura's kids). Which is preface to, my son at 15 months weighed more than Lillian at 32 months. Wow. I say, if the child is healthy, alert, meeting milestones, some people are just tiny, and some are big.
Clue anvil is giving me vaguely Nutty.